/usr/bin/java -Xmx16000000000 -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-Separate.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-dev-29289db [2021-06-05 14:16:53,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:16:53,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:16:53,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:16:53,901 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-Separate.epf [2021-06-05 14:16:53,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:16:53,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:16:53,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:16:53,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:16:53,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:16:53,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:16:53,939 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:16:53,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:16:53,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:16:53,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:16:53,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:16:53,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:16:53,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:16:53,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:16:53,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:16:53,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:16:53,943 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:16:53,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:16:53,943 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:16:53,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:16:54,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:16:54,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:16:54,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:16:54,290 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:16:54,291 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:16:54,292 INFO L432 ainManager$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 [2021-06-05 14:16:54,347 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-06-05 14:16:54,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:16:54,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:16:54,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:16:54,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:16:54,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:16:54,397 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,403 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:16:54,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:16:54,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:16:54,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:16:54,419 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,419 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,423 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,423 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,426 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,428 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,429 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 05.06 02:16:54" (1/1) ... [2021-06-05 14:16:54,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:16:54,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:16:54,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:16:54,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:16:54,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:16:54" (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 [2021-06-05 14:16:54,504 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:16:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:16:54,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:16:54,505 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:16:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:16:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:16:54,506 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:16:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:16:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:16:54,507 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:16:54,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:16:54,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:16:54,508 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:16:54,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:16:54,814 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 14:16:54,815 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 14:16:54,815 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 14:16:54,816 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 14:16:54,817 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:16:54 BoogieIcfgContainer [2021-06-05 14:16:54,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:16:54,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:16:54,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:16:54,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:16:54,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:16:54" (1/2) ... [2021-06-05 14:16:54,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3766f0b5 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:16:54, skipping insertion in model container [2021-06-05 14:16:54,821 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 05.06 02:16:54" (2/2) ... [2021-06-05 14:16:54,822 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-06-05 14:16:54,827 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:16:54,827 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:16:54,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:16:54,828 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:16:54,855 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:16:54,891 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:16:54,922 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:16:54,924 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:16:54,924 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:16:54,924 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:16:54,925 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:16:54,925 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:16:54,925 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:16:54,925 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:16:54,937 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-06-05 14:16:54,955 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) [2021-06-05 14:16:54,958 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) [2021-06-05 14:16:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:54,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:54,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:54,966 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-06-05 14:16:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103887119] [2021-06-05 14:16:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:55,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:55,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103887119] [2021-06-05 14:16:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103887119] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:55,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:55,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613565971] [2021-06-05 14:16:55,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:55,153 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) [2021-06-05 14:16:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:55,308 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-06-05 14:16:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:55,309 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 [2021-06-05 14:16:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:55,323 INFO L225 Difference]: With dead ends: 139 [2021-06-05 14:16:55,323 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 14:16:55,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 14:16:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-06-05 14:16:55,384 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) [2021-06-05 14:16:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-06-05 14:16:55,389 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-06-05 14:16:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:55,391 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-06-05 14:16:55,391 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) [2021-06-05 14:16:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-06-05 14:16:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:55,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:55,395 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:55,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:16:55,397 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-06-05 14:16:55,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:55,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982946033] [2021-06-05 14:16:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:55,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:55,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982946033] [2021-06-05 14:16:55,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982946033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:55,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:55,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:55,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826855803] [2021-06-05 14:16:55,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:55,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:55,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:55,482 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) [2021-06-05 14:16:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:55,610 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-06-05 14:16:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:55,610 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 [2021-06-05 14:16:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:55,613 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:16:55,613 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:16:55,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:16:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-06-05 14:16:55,632 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) [2021-06-05 14:16:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-06-05 14:16:55,633 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-06-05 14:16:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:55,633 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-06-05 14:16:55,634 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) [2021-06-05 14:16:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-06-05 14:16:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:55,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:55,636 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:55,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:16:55,636 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-06-05 14:16:55,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:55,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082030076] [2021-06-05 14:16:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:55,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:55,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082030076] [2021-06-05 14:16:55,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082030076] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:55,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:55,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:55,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114685828] [2021-06-05 14:16:55,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:55,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:55,710 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) [2021-06-05 14:16:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:55,821 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-06-05 14:16:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:55,823 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 [2021-06-05 14:16:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:55,824 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:16:55,824 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:16:55,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:16:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-06-05 14:16:55,838 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) [2021-06-05 14:16:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-06-05 14:16:55,839 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-06-05 14:16:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:55,839 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-06-05 14:16:55,840 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) [2021-06-05 14:16:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-06-05 14:16:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:55,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:55,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:55,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:16:55,841 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-06-05 14:16:55,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:55,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636699970] [2021-06-05 14:16:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:55,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:55,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636699970] [2021-06-05 14:16:55,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636699970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:55,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:55,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017139245] [2021-06-05 14:16:55,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:55,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:55,902 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) [2021-06-05 14:16:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:55,989 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-06-05 14:16:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:55,990 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 [2021-06-05 14:16:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:55,991 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:16:55,992 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:16:55,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:16:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-05 14:16:56,003 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) [2021-06-05 14:16:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-06-05 14:16:56,005 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-06-05 14:16:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:56,005 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-06-05 14:16:56,005 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) [2021-06-05 14:16:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-06-05 14:16:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:56,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:56,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:56,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:16:56,010 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:56,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-06-05 14:16:56,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:56,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404541433] [2021-06-05 14:16:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:56,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404541433] [2021-06-05 14:16:56,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404541433] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:56,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:56,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164291719] [2021-06-05 14:16:56,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:56,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:56,065 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) [2021-06-05 14:16:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:56,132 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-06-05 14:16:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:56,133 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 [2021-06-05 14:16:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:56,134 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:16:56,134 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:16:56,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:16:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-06-05 14:16:56,138 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) [2021-06-05 14:16:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-05 14:16:56,139 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-06-05 14:16:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:56,139 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-05 14:16:56,139 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) [2021-06-05 14:16:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-05 14:16:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:16:56,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:56,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:56,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:16:56,141 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-06-05 14:16:56,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:56,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906980801] [2021-06-05 14:16:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:56,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906980801] [2021-06-05 14:16:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906980801] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:16:56,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:16:56,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:16:56,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271103580] [2021-06-05 14:16:56,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:16:56,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:56,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:16:56,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:16:56,169 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) [2021-06-05 14:16:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:56,240 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-06-05 14:16:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:16:56,241 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 [2021-06-05 14:16:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:56,242 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:16:56,242 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 14:16:56,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:16:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 14:16:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-06-05 14:16:56,247 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) [2021-06-05 14:16:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-05 14:16:56,248 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-06-05 14:16:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:56,248 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-05 14:16:56,248 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) [2021-06-05 14:16:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-05 14:16:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:56,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:56,249 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:56,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:16:56,250 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-06-05 14:16:56,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:56,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189493262] [2021-06-05 14:16:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:56,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189493262] [2021-06-05 14:16:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189493262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:56,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190396702] [2021-06-05 14:16:56,308 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 [2021-06-05 14:16:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:16:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190396702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:56,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:56,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:16:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667247933] [2021-06-05 14:16:56,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:16:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:16:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:16:56,543 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) [2021-06-05 14:16:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:56,648 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-06-05 14:16:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:16:56,649 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 [2021-06-05 14:16:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:56,650 INFO L225 Difference]: With dead ends: 179 [2021-06-05 14:16:56,650 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 14:16:56,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:16:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 14:16:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-06-05 14:16:56,654 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) [2021-06-05 14:16:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-06-05 14:16:56,655 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-06-05 14:16:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:56,655 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-06-05 14:16:56,655 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) [2021-06-05 14:16:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-06-05 14:16:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:56,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:56,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:56,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 14:16:56,870 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-06-05 14:16:56,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:56,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101929679] [2021-06-05 14:16:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:56,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101929679] [2021-06-05 14:16:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101929679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:56,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446932913] [2021-06-05 14:16:56,949 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 [2021-06-05 14:16:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446932913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:57,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:57,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:16:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675729408] [2021-06-05 14:16:57,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:16:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:16:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:16:57,130 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) [2021-06-05 14:16:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:57,305 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-06-05 14:16:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:16:57,306 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 [2021-06-05 14:16:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:57,307 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:16:57,307 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:16:57,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:16:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:16:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-06-05 14:16:57,311 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) [2021-06-05 14:16:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-06-05 14:16:57,312 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-06-05 14:16:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:57,312 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-06-05 14:16:57,312 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) [2021-06-05 14:16:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-06-05 14:16:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:57,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:57,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:57,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:57,529 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1385320832, now seen corresponding path program 2 times [2021-06-05 14:16:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:57,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335329805] [2021-06-05 14:16:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:57,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335329805] [2021-06-05 14:16:57,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335329805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:57,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849578347] [2021-06-05 14:16:57,612 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 [2021-06-05 14:16:57,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:16:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849578347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:57,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:57,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:16:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375562725] [2021-06-05 14:16:57,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:16:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:16:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:16:57,848 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) [2021-06-05 14:16:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:58,024 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-06-05 14:16:58,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:16:58,024 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 [2021-06-05 14:16:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:58,025 INFO L225 Difference]: With dead ends: 193 [2021-06-05 14:16:58,025 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 14:16:58,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:16:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 14:16:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-06-05 14:16:58,031 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) [2021-06-05 14:16:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-06-05 14:16:58,032 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-06-05 14:16:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:58,032 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-06-05 14:16:58,032 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) [2021-06-05 14:16:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-06-05 14:16:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:58,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:58,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:58,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:16:58,257 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:58,257 INFO L82 PathProgramCache]: Analyzing trace with hash 951223692, now seen corresponding path program 3 times [2021-06-05 14:16:58,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:58,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550984167] [2021-06-05 14:16:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:58,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550984167] [2021-06-05 14:16:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550984167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701291550] [2021-06-05 14:16:58,334 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 [2021-06-05 14:16:58,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:16:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:16:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:58,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701291550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:58,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:58,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 14:16:58,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289578815] [2021-06-05 14:16:58,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:16:58,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:58,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:16:58,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:16:58,465 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) [2021-06-05 14:16:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:59,041 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-06-05 14:16:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:16:59,042 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 [2021-06-05 14:16:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:59,043 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:16:59,043 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:16:59,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:16:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:16:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-06-05 14:16:59,048 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) [2021-06-05 14:16:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-06-05 14:16:59,049 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-06-05 14:16:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:59,049 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-06-05 14:16:59,049 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) [2021-06-05 14:16:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-06-05 14:16:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:59,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:59,050 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:59,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:59,272 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-06-05 14:16:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:59,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260838224] [2021-06-05 14:16:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:59,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:59,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260838224] [2021-06-05 14:16:59,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260838224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:59,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852030935] [2021-06-05 14:16:59,315 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 [2021-06-05 14:16:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852030935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:59,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:59,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:16:59,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869426190] [2021-06-05 14:16:59,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:16:59,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:16:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:16:59,451 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) [2021-06-05 14:16:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:59,599 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-06-05 14:16:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:16:59,600 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 [2021-06-05 14:16:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:59,601 INFO L225 Difference]: With dead ends: 191 [2021-06-05 14:16:59,601 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:16:59,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:16:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:16:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-06-05 14:16:59,606 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) [2021-06-05 14:16:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-06-05 14:16:59,607 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-06-05 14:16:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-06-05 14:16:59,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-06-05 14:16:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:16:59,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:59,608 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:59,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:16:59,831 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:16:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-06-05 14:16:59,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:59,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381370669] [2021-06-05 14:16:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:16:59,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381370669] [2021-06-05 14:16:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381370669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084213929] [2021-06-05 14:16:59,891 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 [2021-06-05 14:16:59,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:16:59,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:16:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084213929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:00,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:00,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-05 14:17:00,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117249240] [2021-06-05 14:17:00,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:00,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:00,020 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) [2021-06-05 14:17:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:00,308 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-06-05 14:17:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:17:00,309 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 [2021-06-05 14:17:00,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:00,310 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:17:00,310 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 14:17:00,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 14:17:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-06-05 14:17:00,316 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) [2021-06-05 14:17:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-06-05 14:17:00,317 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-06-05 14:17:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:00,317 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-06-05 14:17:00,317 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) [2021-06-05 14:17:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-06-05 14:17:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:00,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:00,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:17:00,533 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 425707830, now seen corresponding path program 2 times [2021-06-05 14:17:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966635184] [2021-06-05 14:17:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:00,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966635184] [2021-06-05 14:17:00,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966635184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:00,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111603409] [2021-06-05 14:17:00,572 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 [2021-06-05 14:17:00,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:00,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:00,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111603409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:00,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:00,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 14:17:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833276329] [2021-06-05 14:17:00,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:00,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:00,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:00,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:00,731 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) [2021-06-05 14:17:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:01,224 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-06-05 14:17:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:17:01,224 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 [2021-06-05 14:17:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:01,226 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:17:01,226 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:17:01,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:17:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:17:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-06-05 14:17:01,231 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) [2021-06-05 14:17:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-06-05 14:17:01,232 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-06-05 14:17:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:01,232 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-06-05 14:17:01,232 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) [2021-06-05 14:17:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-06-05 14:17:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:01,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:01,233 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:01,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:01,434 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1238287700, now seen corresponding path program 4 times [2021-06-05 14:17:01,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722031534] [2021-06-05 14:17:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:01,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722031534] [2021-06-05 14:17:01,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722031534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321533889] [2021-06-05 14:17:01,479 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 [2021-06-05 14:17:01,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:01,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:01,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321533889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:01,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:01,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636231535] [2021-06-05 14:17:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:01,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:01,626 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) [2021-06-05 14:17:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:01,733 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-06-05 14:17:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:01,734 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 [2021-06-05 14:17:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:01,735 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:17:01,735 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:17:01,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:17:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-06-05 14:17:01,740 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) [2021-06-05 14:17:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-06-05 14:17:01,741 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-06-05 14:17:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:01,741 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-06-05 14:17:01,742 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) [2021-06-05 14:17:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-06-05 14:17:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:01,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:01,742 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:01,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:17:01,949 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1919639656, now seen corresponding path program 5 times [2021-06-05 14:17:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677197913] [2021-06-05 14:17:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:02,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677197913] [2021-06-05 14:17:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677197913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661987516] [2021-06-05 14:17:02,006 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 [2021-06-05 14:17:02,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:02,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:02,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661987516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:02,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:02,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:17:02,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540345157] [2021-06-05 14:17:02,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:17:02,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:17:02,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:17:02,131 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) [2021-06-05 14:17:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:02,225 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-06-05 14:17:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:02,225 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 [2021-06-05 14:17:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:02,226 INFO L225 Difference]: With dead ends: 226 [2021-06-05 14:17:02,226 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:17:02,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:17:02,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-06-05 14:17:02,232 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) [2021-06-05 14:17:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-06-05 14:17:02,233 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-06-05 14:17:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:02,233 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-06-05 14:17:02,233 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) [2021-06-05 14:17:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-06-05 14:17:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:02,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:02,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:02,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:02,445 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 3 times [2021-06-05 14:17:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:02,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694155030] [2021-06-05 14:17:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:02,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694155030] [2021-06-05 14:17:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694155030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:02,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18370886] [2021-06-05 14:17:02,507 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 [2021-06-05 14:17:02,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:17:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18370886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:02,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:02,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 14:17:02,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029383795] [2021-06-05 14:17:02,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:02,631 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) [2021-06-05 14:17:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:03,137 INFO L93 Difference]: Finished difference Result 360 states and 970 transitions. [2021-06-05 14:17:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:17:03,137 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 [2021-06-05 14:17:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:03,139 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:17:03,139 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 14:17:03,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:17:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 14:17:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 169. [2021-06-05 14:17:03,146 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) [2021-06-05 14:17:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 506 transitions. [2021-06-05 14:17:03,147 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 506 transitions. Word has length 15 [2021-06-05 14:17:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:03,147 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 506 transitions. [2021-06-05 14:17:03,147 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) [2021-06-05 14:17:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 506 transitions. [2021-06-05 14:17:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:03,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:03,148 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:03,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:03,372 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 6 times [2021-06-05 14:17:03,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:03,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240506819] [2021-06-05 14:17:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:03,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240506819] [2021-06-05 14:17:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240506819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433289806] [2021-06-05 14:17:03,430 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 [2021-06-05 14:17:03,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:17:03,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:03,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433289806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:03,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:03,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 14:17:03,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136614526] [2021-06-05 14:17:03,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:03,546 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) [2021-06-05 14:17:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:04,066 INFO L93 Difference]: Finished difference Result 395 states and 1063 transitions. [2021-06-05 14:17:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:17:04,066 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 [2021-06-05 14:17:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:04,068 INFO L225 Difference]: With dead ends: 395 [2021-06-05 14:17:04,068 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 14:17:04,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:17:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 14:17:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 188. [2021-06-05 14:17:04,077 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) [2021-06-05 14:17:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 585 transitions. [2021-06-05 14:17:04,078 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 585 transitions. Word has length 15 [2021-06-05 14:17:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:04,079 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 585 transitions. [2021-06-05 14:17:04,079 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) [2021-06-05 14:17:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 585 transitions. [2021-06-05 14:17:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:04,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:04,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:17:04,297 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 3 times [2021-06-05 14:17:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198570871] [2021-06-05 14:17:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:04,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:04,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198570871] [2021-06-05 14:17:04,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198570871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:04,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251526415] [2021-06-05 14:17:04,340 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 [2021-06-05 14:17:04,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:17:04,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:04,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251526415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:04,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:04,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 14:17:04,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490584993] [2021-06-05 14:17:04,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:04,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:04,469 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) [2021-06-05 14:17:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:04,900 INFO L93 Difference]: Finished difference Result 296 states and 839 transitions. [2021-06-05 14:17:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:17:04,901 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 [2021-06-05 14:17:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:04,902 INFO L225 Difference]: With dead ends: 296 [2021-06-05 14:17:04,902 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 14:17:04,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:17:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 14:17:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 185. [2021-06-05 14:17:04,908 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) [2021-06-05 14:17:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 571 transitions. [2021-06-05 14:17:04,909 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 571 transitions. Word has length 15 [2021-06-05 14:17:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:04,909 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 571 transitions. [2021-06-05 14:17:04,910 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) [2021-06-05 14:17:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 571 transitions. [2021-06-05 14:17:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:04,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:04,910 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:05,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:05,125 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1752078530, now seen corresponding path program 4 times [2021-06-05 14:17:05,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:05,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094244155] [2021-06-05 14:17:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:05,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:05,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094244155] [2021-06-05 14:17:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094244155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:05,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037280143] [2021-06-05 14:17:05,155 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 [2021-06-05 14:17:05,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037280143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:05,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:05,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:17:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37664843] [2021-06-05 14:17:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:17:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:17:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:17:05,248 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) [2021-06-05 14:17:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:05,331 INFO L93 Difference]: Finished difference Result 224 states and 652 transitions. [2021-06-05 14:17:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:05,332 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 [2021-06-05 14:17:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:05,333 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:17:05,333 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:17:05,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:17:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-06-05 14:17:05,339 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) [2021-06-05 14:17:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 552 transitions. [2021-06-05 14:17:05,340 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 552 transitions. Word has length 15 [2021-06-05 14:17:05,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:05,340 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 552 transitions. [2021-06-05 14:17:05,340 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) [2021-06-05 14:17:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 552 transitions. [2021-06-05 14:17:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:05,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:05,341 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:05,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:17:05,565 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:05,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 7 times [2021-06-05 14:17:05,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:05,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967017645] [2021-06-05 14:17:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:05,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:05,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967017645] [2021-06-05 14:17:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967017645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954059871] [2021-06-05 14:17:05,618 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 [2021-06-05 14:17:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:05,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954059871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:05,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:05,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:17:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980311372] [2021-06-05 14:17:05,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:05,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:05,759 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) [2021-06-05 14:17:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:05,883 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-06-05 14:17:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:05,884 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 [2021-06-05 14:17:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:05,885 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:17:05,885 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 14:17:05,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 14:17:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 178. [2021-06-05 14:17:05,890 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) [2021-06-05 14:17:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 546 transitions. [2021-06-05 14:17:05,891 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 546 transitions. Word has length 15 [2021-06-05 14:17:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:05,891 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 546 transitions. [2021-06-05 14:17:05,891 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) [2021-06-05 14:17:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 546 transitions. [2021-06-05 14:17:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:05,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:05,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:06,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:06,105 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1883825052, now seen corresponding path program 8 times [2021-06-05 14:17:06,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:06,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623760168] [2021-06-05 14:17:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:06,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:06,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623760168] [2021-06-05 14:17:06,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623760168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:06,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129334917] [2021-06-05 14:17:06,166 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 [2021-06-05 14:17:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:06,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129334917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:06,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:06,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 14:17:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251526773] [2021-06-05 14:17:06,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:06,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:06,282 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) [2021-06-05 14:17:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:06,810 INFO L93 Difference]: Finished difference Result 322 states and 890 transitions. [2021-06-05 14:17:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:17:06,811 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 [2021-06-05 14:17:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:06,812 INFO L225 Difference]: With dead ends: 322 [2021-06-05 14:17:06,812 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 14:17:06,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:17:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 14:17:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 168. [2021-06-05 14:17:06,817 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) [2021-06-05 14:17:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 504 transitions. [2021-06-05 14:17:06,818 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 504 transitions. Word has length 15 [2021-06-05 14:17:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:06,818 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 504 transitions. [2021-06-05 14:17:06,818 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) [2021-06-05 14:17:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 504 transitions. [2021-06-05 14:17:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:06,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:06,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:07,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 14:17:07,033 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2044993746, now seen corresponding path program 9 times [2021-06-05 14:17:07,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:07,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249088434] [2021-06-05 14:17:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:07,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249088434] [2021-06-05 14:17:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249088434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256459775] [2021-06-05 14:17:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:17:07,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:17:07,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:07,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256459775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:07,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:07,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:17:07,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922428042] [2021-06-05 14:17:07,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:07,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:07,245 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) [2021-06-05 14:17:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:07,368 INFO L93 Difference]: Finished difference Result 251 states and 721 transitions. [2021-06-05 14:17:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:07,369 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 [2021-06-05 14:17:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:07,370 INFO L225 Difference]: With dead ends: 251 [2021-06-05 14:17:07,370 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 14:17:07,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 14:17:07,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-06-05 14:17:07,377 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) [2021-06-05 14:17:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 501 transitions. [2021-06-05 14:17:07,377 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 501 transitions. Word has length 15 [2021-06-05 14:17:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:07,378 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 501 transitions. [2021-06-05 14:17:07,378 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) [2021-06-05 14:17:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 501 transitions. [2021-06-05 14:17:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:07,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:07,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:07,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:07,597 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 4 times [2021-06-05 14:17:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191194235] [2021-06-05 14:17:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:07,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191194235] [2021-06-05 14:17:07,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191194235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:07,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970285643] [2021-06-05 14:17:07,625 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 [2021-06-05 14:17:07,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970285643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:07,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:07,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:17:07,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365172160] [2021-06-05 14:17:07,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:17:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:17:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:17:07,714 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) [2021-06-05 14:17:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:07,804 INFO L93 Difference]: Finished difference Result 216 states and 623 transitions. [2021-06-05 14:17:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:07,804 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 [2021-06-05 14:17:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:07,805 INFO L225 Difference]: With dead ends: 216 [2021-06-05 14:17:07,805 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:17:07,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:17:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-06-05 14:17:07,810 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) [2021-06-05 14:17:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 508 transitions. [2021-06-05 14:17:07,810 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 508 transitions. Word has length 15 [2021-06-05 14:17:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:07,811 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 508 transitions. [2021-06-05 14:17:07,811 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) [2021-06-05 14:17:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 508 transitions. [2021-06-05 14:17:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:07,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:07,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:08,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:08,033 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -838645562, now seen corresponding path program 10 times [2021-06-05 14:17:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968041130] [2021-06-05 14:17:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:08,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968041130] [2021-06-05 14:17:08,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968041130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917539956] [2021-06-05 14:17:08,091 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 [2021-06-05 14:17:08,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:08,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917539956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:08,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:08,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:17:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754005589] [2021-06-05 14:17:08,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:08,222 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) [2021-06-05 14:17:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:08,338 INFO L93 Difference]: Finished difference Result 216 states and 576 transitions. [2021-06-05 14:17:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:08,338 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 [2021-06-05 14:17:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:08,339 INFO L225 Difference]: With dead ends: 216 [2021-06-05 14:17:08,339 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:17:08,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:17:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-06-05 14:17:08,344 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) [2021-06-05 14:17:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 492 transitions. [2021-06-05 14:17:08,345 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 492 transitions. Word has length 15 [2021-06-05 14:17:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:08,345 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 492 transitions. [2021-06-05 14:17:08,345 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) [2021-06-05 14:17:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 492 transitions. [2021-06-05 14:17:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:08,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:08,346 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:08,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 14:17:08,547 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061836, now seen corresponding path program 5 times [2021-06-05 14:17:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:08,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740793598] [2021-06-05 14:17:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:08,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740793598] [2021-06-05 14:17:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740793598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56543172] [2021-06-05 14:17:08,586 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 [2021-06-05 14:17:08,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:08,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:08,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:08,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56543172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:08,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:08,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:17:08,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322480710] [2021-06-05 14:17:08,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:08,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:08,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:08,679 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) [2021-06-05 14:17:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:08,937 INFO L93 Difference]: Finished difference Result 232 states and 645 transitions. [2021-06-05 14:17:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:17:08,938 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 [2021-06-05 14:17:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:08,939 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:17:08,939 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 14:17:08,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 14:17:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-06-05 14:17:08,943 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) [2021-06-05 14:17:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 465 transitions. [2021-06-05 14:17:08,944 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 465 transitions. Word has length 15 [2021-06-05 14:17:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:08,944 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 465 transitions. [2021-06-05 14:17:08,944 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) [2021-06-05 14:17:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 465 transitions. [2021-06-05 14:17:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:08,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:08,945 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:09,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:09,161 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:09,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:09,161 INFO L82 PathProgramCache]: Analyzing trace with hash -260492346, now seen corresponding path program 11 times [2021-06-05 14:17:09,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:09,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316718139] [2021-06-05 14:17:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:09,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316718139] [2021-06-05 14:17:09,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316718139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562376150] [2021-06-05 14:17:09,205 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 [2021-06-05 14:17:09,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:09,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562376150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:09,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:09,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:09,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178875781] [2021-06-05 14:17:09,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:09,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:09,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:09,331 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) [2021-06-05 14:17:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:09,483 INFO L93 Difference]: Finished difference Result 214 states and 577 transitions. [2021-06-05 14:17:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:09,483 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 [2021-06-05 14:17:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:09,484 INFO L225 Difference]: With dead ends: 214 [2021-06-05 14:17:09,484 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 14:17:09,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 14:17:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 156. [2021-06-05 14:17:09,488 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) [2021-06-05 14:17:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-06-05 14:17:09,489 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-06-05 14:17:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:09,489 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-06-05 14:17:09,489 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) [2021-06-05 14:17:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-06-05 14:17:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:09,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:09,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:09,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 14:17:09,692 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 6 times [2021-06-05 14:17:09,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:09,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212062236] [2021-06-05 14:17:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:09,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212062236] [2021-06-05 14:17:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212062236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:09,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430746192] [2021-06-05 14:17:09,724 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 [2021-06-05 14:17:09,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:17:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:09,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430746192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:09,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:09,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 14:17:09,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546408955] [2021-06-05 14:17:09,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:17:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:17:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:17:09,788 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) [2021-06-05 14:17:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:09,863 INFO L93 Difference]: Finished difference Result 192 states and 534 transitions. [2021-06-05 14:17:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:09,864 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 [2021-06-05 14:17:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:09,865 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:17:09,865 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:17:09,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:17:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-06-05 14:17:09,869 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) [2021-06-05 14:17:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 401 transitions. [2021-06-05 14:17:09,869 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 401 transitions. Word has length 15 [2021-06-05 14:17:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:09,870 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 401 transitions. [2021-06-05 14:17:09,870 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) [2021-06-05 14:17:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 401 transitions. [2021-06-05 14:17:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:09,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:09,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:10,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:10,085 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 5 times [2021-06-05 14:17:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:10,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038598484] [2021-06-05 14:17:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:10,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038598484] [2021-06-05 14:17:10,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038598484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271731756] [2021-06-05 14:17:10,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:17:10,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271731756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:10,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:17:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141872036] [2021-06-05 14:17:10,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:10,236 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) [2021-06-05 14:17:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:10,349 INFO L93 Difference]: Finished difference Result 165 states and 444 transitions. [2021-06-05 14:17:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:10,349 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 [2021-06-05 14:17:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:10,350 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:17:10,350 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 14:17:10,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 14:17:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-06-05 14:17:10,353 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) [2021-06-05 14:17:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 397 transitions. [2021-06-05 14:17:10,354 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 397 transitions. Word has length 15 [2021-06-05 14:17:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:10,354 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 397 transitions. [2021-06-05 14:17:10,354 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) [2021-06-05 14:17:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 397 transitions. [2021-06-05 14:17:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:10,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:10,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:10,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:10,569 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 6 times [2021-06-05 14:17:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:10,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564764252] [2021-06-05 14:17:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564764252] [2021-06-05 14:17:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564764252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232974341] [2021-06-05 14:17:10,616 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 [2021-06-05 14:17:10,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:17:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:10,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232974341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:10,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:10,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 14:17:10,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98321708] [2021-06-05 14:17:10,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:10,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:10,722 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) [2021-06-05 14:17:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:11,054 INFO L93 Difference]: Finished difference Result 223 states and 580 transitions. [2021-06-05 14:17:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:17:11,055 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 [2021-06-05 14:17:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:11,056 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:17:11,056 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 14:17:11,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:17:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 14:17:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 137. [2021-06-05 14:17:11,060 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) [2021-06-05 14:17:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 402 transitions. [2021-06-05 14:17:11,060 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 402 transitions. Word has length 15 [2021-06-05 14:17:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:11,060 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 402 transitions. [2021-06-05 14:17:11,061 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) [2021-06-05 14:17:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 402 transitions. [2021-06-05 14:17:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:11,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:11,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:11,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 14:17:11,277 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1341646634, now seen corresponding path program 7 times [2021-06-05 14:17:11,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:11,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674456531] [2021-06-05 14:17:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:11,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674456531] [2021-06-05 14:17:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674456531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:11,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024414288] [2021-06-05 14:17:11,324 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 [2021-06-05 14:17:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:11,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024414288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:11,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:11,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:17:11,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609548166] [2021-06-05 14:17:11,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:11,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:11,441 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) [2021-06-05 14:17:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:11,550 INFO L93 Difference]: Finished difference Result 182 states and 485 transitions. [2021-06-05 14:17:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:11,550 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 [2021-06-05 14:17:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:11,551 INFO L225 Difference]: With dead ends: 182 [2021-06-05 14:17:11,551 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:17:11,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:17:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-06-05 14:17:11,554 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) [2021-06-05 14:17:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 414 transitions. [2021-06-05 14:17:11,555 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 414 transitions. Word has length 15 [2021-06-05 14:17:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:11,555 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 414 transitions. [2021-06-05 14:17:11,555 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) [2021-06-05 14:17:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 414 transitions. [2021-06-05 14:17:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:11,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:11,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:11,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 14:17:11,778 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:11,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 12 times [2021-06-05 14:17:11,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:11,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248346719] [2021-06-05 14:17:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:11,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:11,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248346719] [2021-06-05 14:17:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248346719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380004337] [2021-06-05 14:17:11,819 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 [2021-06-05 14:17:11,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:17:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:11,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380004337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:11,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:11,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:11,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093557912] [2021-06-05 14:17:11,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:11,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:11,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:11,929 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) [2021-06-05 14:17:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:12,051 INFO L93 Difference]: Finished difference Result 222 states and 585 transitions. [2021-06-05 14:17:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:12,051 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 [2021-06-05 14:17:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:12,052 INFO L225 Difference]: With dead ends: 222 [2021-06-05 14:17:12,052 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:17:12,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:17:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-06-05 14:17:12,056 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) [2021-06-05 14:17:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 425 transitions. [2021-06-05 14:17:12,056 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 425 transitions. Word has length 15 [2021-06-05 14:17:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:12,056 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 425 transitions. [2021-06-05 14:17:12,057 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) [2021-06-05 14:17:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 425 transitions. [2021-06-05 14:17:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:12,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:12,057 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:12,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 14:17:12,273 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1876876436, now seen corresponding path program 8 times [2021-06-05 14:17:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:12,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934990864] [2021-06-05 14:17:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:12,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:12,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934990864] [2021-06-05 14:17:12,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934990864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:12,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032304030] [2021-06-05 14:17:12,318 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 [2021-06-05 14:17:12,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:12,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032304030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:12,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:12,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:12,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2648073] [2021-06-05 14:17:12,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:12,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:12,440 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) [2021-06-05 14:17:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:12,557 INFO L93 Difference]: Finished difference Result 172 states and 476 transitions. [2021-06-05 14:17:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:12,557 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 [2021-06-05 14:17:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:12,558 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:17:12,558 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 14:17:12,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:17:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 14:17:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2021-06-05 14:17:12,561 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) [2021-06-05 14:17:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-06-05 14:17:12,562 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-06-05 14:17:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:12,562 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-06-05 14:17:12,562 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) [2021-06-05 14:17:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-06-05 14:17:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:12,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:12,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:12,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 14:17:12,773 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1270559102, now seen corresponding path program 13 times [2021-06-05 14:17:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:12,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964438983] [2021-06-05 14:17:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:12,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:12,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964438983] [2021-06-05 14:17:12,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964438983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:12,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412259751] [2021-06-05 14:17:12,825 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 [2021-06-05 14:17:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:12,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412259751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:12,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:12,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:17:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359946139] [2021-06-05 14:17:12,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:12,921 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) [2021-06-05 14:17:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:13,053 INFO L93 Difference]: Finished difference Result 205 states and 556 transitions. [2021-06-05 14:17:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:13,054 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 [2021-06-05 14:17:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:13,055 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:17:13,055 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:17:13,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:17:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-06-05 14:17:13,059 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) [2021-06-05 14:17:13,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-06-05 14:17:13,060 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-06-05 14:17:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:13,061 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-06-05 14:17:13,061 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) [2021-06-05 14:17:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-06-05 14:17:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:13,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:13,061 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:13,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 14:17:13,285 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash 647834570, now seen corresponding path program 9 times [2021-06-05 14:17:13,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:13,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163947291] [2021-06-05 14:17:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:13,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163947291] [2021-06-05 14:17:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163947291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085399088] [2021-06-05 14:17:13,322 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 [2021-06-05 14:17:13,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:17:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085399088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 14:17:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620863512] [2021-06-05 14:17:13,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:17:13,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:17:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:13,414 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) [2021-06-05 14:17:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:13,673 INFO L93 Difference]: Finished difference Result 220 states and 577 transitions. [2021-06-05 14:17:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:17:13,673 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 [2021-06-05 14:17:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:13,674 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:17:13,674 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 14:17:13,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:17:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 14:17:13,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-06-05 14:17:13,677 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) [2021-06-05 14:17:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-06-05 14:17:13,677 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-06-05 14:17:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:13,678 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-06-05 14:17:13,678 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) [2021-06-05 14:17:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-06-05 14:17:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:13,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:13,678 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:13,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:13,893 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash 716296326, now seen corresponding path program 14 times [2021-06-05 14:17:13,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:13,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29216875] [2021-06-05 14:17:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:13,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29216875] [2021-06-05 14:17:13,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29216875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680867308] [2021-06-05 14:17:13,934 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 [2021-06-05 14:17:13,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:13,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:13,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:13,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:14,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680867308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:14,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:14,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:14,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895823324] [2021-06-05 14:17:14,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:14,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:14,053 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) [2021-06-05 14:17:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:14,139 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-06-05 14:17:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:14,139 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 [2021-06-05 14:17:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:14,140 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:17:14,140 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:17:14,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:17:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2021-06-05 14:17:14,142 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) [2021-06-05 14:17:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 395 transitions. [2021-06-05 14:17:14,143 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 395 transitions. Word has length 15 [2021-06-05 14:17:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:14,143 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 395 transitions. [2021-06-05 14:17:14,143 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) [2021-06-05 14:17:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 395 transitions. [2021-06-05 14:17:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:14,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:14,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:14,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 14:17:14,344 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 209950060, now seen corresponding path program 15 times [2021-06-05 14:17:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:14,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392681118] [2021-06-05 14:17:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:14,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:14,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392681118] [2021-06-05 14:17:14,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392681118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:14,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427504740] [2021-06-05 14:17:14,380 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 [2021-06-05 14:17:14,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:17:14,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:14,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427504740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:14,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:14,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:17:14,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312965085] [2021-06-05 14:17:14,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:17:14,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:17:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:14,491 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) [2021-06-05 14:17:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:14,614 INFO L93 Difference]: Finished difference Result 197 states and 527 transitions. [2021-06-05 14:17:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:14,614 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 [2021-06-05 14:17:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:14,615 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:17:14,615 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 14:17:14,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 14:17:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2021-06-05 14:17:14,617 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) [2021-06-05 14:17:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2021-06-05 14:17:14,618 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 15 [2021-06-05 14:17:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:14,618 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2021-06-05 14:17:14,618 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) [2021-06-05 14:17:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2021-06-05 14:17:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:14,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:14,619 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:14,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:14,829 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 524208692, now seen corresponding path program 10 times [2021-06-05 14:17:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238228201] [2021-06-05 14:17:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:14,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238228201] [2021-06-05 14:17:14,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238228201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857819728] [2021-06-05 14:17:14,870 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 [2021-06-05 14:17:14,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:14,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857819728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:14,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:14,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:17:14,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315009076] [2021-06-05 14:17:14,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:14,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:14,971 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) [2021-06-05 14:17:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:15,091 INFO L93 Difference]: Finished difference Result 180 states and 469 transitions. [2021-06-05 14:17:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:15,091 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 [2021-06-05 14:17:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:15,092 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:17:15,092 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 14:17:15,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 14:17:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-06-05 14:17:15,095 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) [2021-06-05 14:17:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 389 transitions. [2021-06-05 14:17:15,095 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 389 transitions. Word has length 15 [2021-06-05 14:17:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 389 transitions. [2021-06-05 14:17:15,095 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) [2021-06-05 14:17:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 389 transitions. [2021-06-05 14:17:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:15,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:15,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:15,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 14:17:15,313 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 22578118, now seen corresponding path program 11 times [2021-06-05 14:17:15,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:15,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651171955] [2021-06-05 14:17:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:15,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651171955] [2021-06-05 14:17:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651171955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250007828] [2021-06-05 14:17:15,345 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 [2021-06-05 14:17:15,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:15,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:15,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250007828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:15,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:17:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834287338] [2021-06-05 14:17:15,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:17:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:17:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:17:15,439 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) [2021-06-05 14:17:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:15,542 INFO L93 Difference]: Finished difference Result 154 states and 429 transitions. [2021-06-05 14:17:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:15,542 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 [2021-06-05 14:17:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:15,543 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:17:15,543 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:17:15,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:17:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-06-05 14:17:15,546 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) [2021-06-05 14:17:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 377 transitions. [2021-06-05 14:17:15,547 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 377 transitions. Word has length 15 [2021-06-05 14:17:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:15,547 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 377 transitions. [2021-06-05 14:17:15,547 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) [2021-06-05 14:17:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 377 transitions. [2021-06-05 14:17:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:17:15,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:15,547 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 14:17:15,769 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 212575836, now seen corresponding path program 16 times [2021-06-05 14:17:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180500110] [2021-06-05 14:17:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:15,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180500110] [2021-06-05 14:17:15,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180500110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117236194] [2021-06-05 14:17:15,810 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 [2021-06-05 14:17:15,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:15,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117236194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:15,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 14:17:15,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475773369] [2021-06-05 14:17:15,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:15,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:15,911 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) [2021-06-05 14:17:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:16,000 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-06-05 14:17:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:17:16,000 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 [2021-06-05 14:17:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:16,001 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:17:16,001 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:17:16,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:17:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2021-06-05 14:17:16,003 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) [2021-06-05 14:17:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-06-05 14:17:16,003 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 15 [2021-06-05 14:17:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:16,003 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-06-05 14:17:16,003 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) [2021-06-05 14:17:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-06-05 14:17:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:17:16,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:16,004 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:16,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:16,204 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 1 times [2021-06-05 14:17:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:16,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692861423] [2021-06-05 14:17:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:17:16,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:16,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692861423] [2021-06-05 14:17:16,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692861423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:16,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15407998] [2021-06-05 14:17:16,242 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 [2021-06-05 14:17:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:17:16,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15407998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:16,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:16,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 14:17:16,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158665357] [2021-06-05 14:17:16,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:17:16,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:17:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:17:16,352 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) [2021-06-05 14:17:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:16,447 INFO L93 Difference]: Finished difference Result 161 states and 443 transitions. [2021-06-05 14:17:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:16,448 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 [2021-06-05 14:17:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:16,449 INFO L225 Difference]: With dead ends: 161 [2021-06-05 14:17:16,449 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:17:16,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:17:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:17:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-06-05 14:17:16,451 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) [2021-06-05 14:17:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 360 transitions. [2021-06-05 14:17:16,452 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 360 transitions. Word has length 16 [2021-06-05 14:17:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:16,452 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 360 transitions. [2021-06-05 14:17:16,452 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) [2021-06-05 14:17:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 360 transitions. [2021-06-05 14:17:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:17:16,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:16,453 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 14:17:16,669 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 2 times [2021-06-05 14:17:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192923304] [2021-06-05 14:17:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:17:16,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192923304] [2021-06-05 14:17:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192923304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:16,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960415354] [2021-06-05 14:17:16,700 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 [2021-06-05 14:17:16,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:17:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960415354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:16,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:16,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 14:17:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965999277] [2021-06-05 14:17:16,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:17:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:17:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:17:16,798 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) [2021-06-05 14:17:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:16,855 INFO L93 Difference]: Finished difference Result 156 states and 442 transitions. [2021-06-05 14:17:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:17:16,856 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 [2021-06-05 14:17:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:16,858 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:17:16,858 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 14:17:16,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:17:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 14:17:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-06-05 14:17:16,860 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) [2021-06-05 14:17:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-06-05 14:17:16,860 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-06-05 14:17:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:16,860 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-06-05 14:17:16,860 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) [2021-06-05 14:17:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-06-05 14:17:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:16,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:16,861 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:17,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:17,061 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-06-05 14:17:17,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:17,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558664919] [2021-06-05 14:17:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:17,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:17,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558664919] [2021-06-05 14:17:17,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558664919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:17,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778103602] [2021-06-05 14:17:17,395 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 [2021-06-05 14:17:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:17,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,697 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 [2021-06-05 14:17:17,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:17,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,721 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 17 treesize of output 13 [2021-06-05 14:17:17,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:17,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:17,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:17,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:17,773 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 [2021-06-05 14:17:17,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:17,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:17,824 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. [2021-06-05 14:17:17,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:123, output treesize:111 [2021-06-05 14:17:18,242 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-05 14:17:18,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,253 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 18 treesize of output 14 [2021-06-05 14:17:18,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:17:18,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:18,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,281 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 28 treesize of output 22 [2021-06-05 14:17:18,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:18,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,290 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 37 treesize of output 29 [2021-06-05 14:17:18,292 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:18,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:18,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:18,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,311 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 [2021-06-05 14:17:18,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:18,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,329 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 [2021-06-05 14:17:18,330 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,337 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 27 treesize of output 21 [2021-06-05 14:17:18,338 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,624 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-06-05 14:17:18,625 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-06-05 14:17:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:18,633 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,639 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 [2021-06-05 14:17:18,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:18,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,656 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 20 treesize of output 9 [2021-06-05 14:17:18,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,663 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 10 treesize of output 5 [2021-06-05 14:17:18,663 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,670 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 9 treesize of output 3 [2021-06-05 14:17:18,671 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,678 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 23 treesize of output 11 [2021-06-05 14:17:18,679 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,686 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 12 treesize of output 5 [2021-06-05 14:17:18,687 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:18,707 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,713 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 21 treesize of output 7 [2021-06-05 14:17:18,714 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,732 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 24 treesize of output 9 [2021-06-05 14:17:18,733 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:18,738 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 44 treesize of output 19 [2021-06-05 14:17:18,739 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:18,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:18,897 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 14:17:18,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:18,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:18,905 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:419, output treesize:179 [2021-06-05 14:17:19,076 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:17:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778103602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:19,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:19,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:19,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295342531] [2021-06-05 14:17:19,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:19,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:19,157 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) [2021-06-05 14:17:20,022 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:17:20,253 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-06-05 14:17:20,476 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-05 14:17:20,745 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-05 14:17:21,033 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 115 [2021-06-05 14:17:21,274 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2021-06-05 14:17:21,535 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2021-06-05 14:17:21,843 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2021-06-05 14:17:22,149 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2021-06-05 14:17:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:22,211 INFO L93 Difference]: Finished difference Result 294 states and 803 transitions. [2021-06-05 14:17:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:17:22,211 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 [2021-06-05 14:17:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:22,212 INFO L225 Difference]: With dead ends: 294 [2021-06-05 14:17:22,212 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 14:17:22,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3179.2ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:17:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 14:17:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-05 14:17:22,218 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) [2021-06-05 14:17:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-05 14:17:22,219 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-06-05 14:17:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:22,219 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-05 14:17:22,219 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) [2021-06-05 14:17:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-05 14:17:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:22,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:22,220 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:22,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:22,433 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash -310438566, now seen corresponding path program 2 times [2021-06-05 14:17:22,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:22,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777529871] [2021-06-05 14:17:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:22,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:22,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777529871] [2021-06-05 14:17:22,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777529871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:22,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850182213] [2021-06-05 14:17:22,683 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 [2021-06-05 14:17:22,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:17:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:23,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:23,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,291 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:17:23,291 INFO L628 ElimStorePlain]: treesize reduction 35, result has 80.7 percent of original size [2021-06-05 14:17:23,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:23,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:23,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:23,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,345 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 25 treesize of output 19 [2021-06-05 14:17:23,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:23,418 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. [2021-06-05 14:17:23,418 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:195, output treesize:141 [2021-06-05 14:17:23,672 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, array_4, v_prenex_17], 1=[array_0, v_prenex_18, v_prenex_16]} [2021-06-05 14:17:23,677 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 17 treesize of output 13 [2021-06-05 14:17:23,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,683 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 19 treesize of output 15 [2021-06-05 14:17:23,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,813 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 14:17:23,813 INFO L628 ElimStorePlain]: treesize reduction 31, result has 86.1 percent of original size [2021-06-05 14:17:23,816 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 27 treesize of output 21 [2021-06-05 14:17:23,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:23,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:23,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:23,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:17:23,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,891 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 18 treesize of output 14 [2021-06-05 14:17:23,892 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,896 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 20 treesize of output 16 [2021-06-05 14:17:23,897 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,961 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 11 treesize of output 3 [2021-06-05 14:17:23,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:23,965 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 21 treesize of output 7 [2021-06-05 14:17:23,966 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:23,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:24,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:24,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,035 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 [2021-06-05 14:17:24,036 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,040 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 9 treesize of output 3 [2021-06-05 14:17:24,041 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,102 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 10 treesize of output 5 [2021-06-05 14:17:24,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,108 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 24 treesize of output 9 [2021-06-05 14:17:24,109 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,113 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 [2021-06-05 14:17:24,114 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:24,118 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 12 treesize of output 5 [2021-06-05 14:17:24,118 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:24,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:24,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:24,174 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 9 variables, input treesize:237, output treesize:57 [2021-06-05 14:17:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:24,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850182213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:24,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:24,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678509348] [2021-06-05 14:17:24,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:24,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:24,230 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) [2021-06-05 14:17:24,582 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:17:24,780 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 14:17:24,939 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-05 14:17:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:25,097 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-06-05 14:17:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:17:25,098 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 [2021-06-05 14:17:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:25,099 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:17:25,099 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:17:25,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1149.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:17:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:17:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-06-05 14:17:25,102 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) [2021-06-05 14:17:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-06-05 14:17:25,103 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-06-05 14:17:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:25,103 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-06-05 14:17:25,103 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) [2021-06-05 14:17:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-06-05 14:17:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:25,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:25,104 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:25,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 14:17:25,327 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:25,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1170799304, now seen corresponding path program 3 times [2021-06-05 14:17:25,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349839634] [2021-06-05 14:17:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:25,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349839634] [2021-06-05 14:17:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349839634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529497312] [2021-06-05 14:17:25,543 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 [2021-06-05 14:17:25,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:17:25,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:17:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:25,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:25,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:25,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:25,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:26,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,025 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 17 treesize of output 13 [2021-06-05 14:17:26,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,100 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 25 treesize of output 19 [2021-06-05 14:17:26,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,106 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 [2021-06-05 14:17:26,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:26,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,178 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. [2021-06-05 14:17:26,178 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:17:26,452 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]} [2021-06-05 14:17:26,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:17:26,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,467 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 21 treesize of output 17 [2021-06-05 14:17:26,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,476 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 30 treesize of output 24 [2021-06-05 14:17:26,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:17:26,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,722 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-06-05 14:17:26,723 INFO L628 ElimStorePlain]: treesize reduction 141, result has 58.0 percent of original size [2021-06-05 14:17:26,728 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 19 treesize of output 15 [2021-06-05 14:17:26,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,784 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 7 treesize of output 5 [2021-06-05 14:17:26,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,837 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 7 treesize of output 5 [2021-06-05 14:17:26,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:26,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:26,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:26,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:17:26,944 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:26,950 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,954 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 21 treesize of output 7 [2021-06-05 14:17:26,955 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:26,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:26,960 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 11 treesize of output 3 [2021-06-05 14:17:26,961 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:27,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:27,026 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:17:27,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_35 vanished before elimination [2021-06-05 14:17:27,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:27,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:27,031 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 [2021-06-05 14:17:27,032 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:27,036 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 20 treesize of output 9 [2021-06-05 14:17:27,037 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:27,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:27,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:27,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:27,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:27,107 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:27,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:27,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:17:27,166 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 15 variables, input treesize:364, output treesize:62 [2021-06-05 14:17:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:27,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529497312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:27,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:27,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:17:27,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730598189] [2021-06-05 14:17:27,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:27,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:27,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:27,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:27,229 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) [2021-06-05 14:17:27,616 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:17:27,799 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 14:17:28,075 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 118 [2021-06-05 14:17:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:28,237 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-06-05 14:17:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:17:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:17:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:28,239 INFO L225 Difference]: With dead ends: 228 [2021-06-05 14:17:28,239 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 14:17:28,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1287.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:17:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 14:17:28,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-06-05 14:17:28,242 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) [2021-06-05 14:17:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-06-05 14:17:28,242 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-06-05 14:17:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:28,242 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-06-05 14:17:28,243 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) [2021-06-05 14:17:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-06-05 14:17:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:28,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:28,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:28,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:28,465 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash 227417012, now seen corresponding path program 4 times [2021-06-05 14:17:28,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:28,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886055769] [2021-06-05 14:17:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:28,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886055769] [2021-06-05 14:17:28,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886055769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:28,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130336520] [2021-06-05 14:17:28,718 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 [2021-06-05 14:17:28,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:28,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:28,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:28,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:28,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:28,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:28,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:28,999 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 17 treesize of output 13 [2021-06-05 14:17:29,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,046 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 27 treesize of output 21 [2021-06-05 14:17:29,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:29,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,050 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 25 treesize of output 19 [2021-06-05 14:17:29,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,097 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. [2021-06-05 14:17:29,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-05 14:17:29,382 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:17:29,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:29,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:17:29,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:17:29,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,408 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 [2021-06-05 14:17:29,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,415 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 [2021-06-05 14:17:29,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,422 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 [2021-06-05 14:17:29,423 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,429 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 37 treesize of output 29 [2021-06-05 14:17:29,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:29,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,437 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 17 treesize of output 13 [2021-06-05 14:17:29,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,444 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 [2021-06-05 14:17:29,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,450 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 35 treesize of output 27 [2021-06-05 14:17:29,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:29,710 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-05 14:17:29,711 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-05 14:17:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:29,722 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,727 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 [2021-06-05 14:17:29,728 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,741 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 10 treesize of output 5 [2021-06-05 14:17:29,742 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,747 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 11 treesize of output 3 [2021-06-05 14:17:29,747 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,752 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 21 treesize of output 7 [2021-06-05 14:17:29,752 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,774 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 23 treesize of output 11 [2021-06-05 14:17:29,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,780 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 [2021-06-05 14:17:29,781 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,798 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 44 treesize of output 19 [2021-06-05 14:17:29,799 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,804 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 24 treesize of output 9 [2021-06-05 14:17:29,805 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:17:29,823 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:29,826 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 9 treesize of output 3 [2021-06-05 14:17:29,827 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:29,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:29,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:29,927 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-05 14:17:30,077 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:17:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:30,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130336520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:30,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:30,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:30,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942796144] [2021-06-05 14:17:30,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:30,160 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) [2021-06-05 14:17:30,875 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 14:17:31,088 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-06-05 14:17:31,247 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-06-05 14:17:31,424 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 14:17:31,640 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 14:17:31,795 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 14:17:32,007 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 14:17:32,204 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 14:17:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:32,265 INFO L93 Difference]: Finished difference Result 261 states and 746 transitions. [2021-06-05 14:17:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:17:32,265 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 [2021-06-05 14:17:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:32,267 INFO L225 Difference]: With dead ends: 261 [2021-06-05 14:17:32,267 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 14:17:32,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2216.3ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:17:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 14:17:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 158. [2021-06-05 14:17:32,271 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) [2021-06-05 14:17:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-05 14:17:32,271 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-06-05 14:17:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:32,271 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-05 14:17:32,271 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) [2021-06-05 14:17:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-05 14:17:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:32,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:32,272 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:32,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:32,485 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1708654882, now seen corresponding path program 5 times [2021-06-05 14:17:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:32,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288111096] [2021-06-05 14:17:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:32,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288111096] [2021-06-05 14:17:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288111096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:32,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622985797] [2021-06-05 14:17:32,712 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 [2021-06-05 14:17:32,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:17:32,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:32,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:32,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:32,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,002 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 [2021-06-05 14:17:33,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:33,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,012 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 35 treesize of output 27 [2021-06-05 14:17:33,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:33,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:33,101 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. [2021-06-05 14:17:33,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:175, output treesize:235 [2021-06-05 14:17:33,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,345 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 30 treesize of output 24 [2021-06-05 14:17:33,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:17:33,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,367 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 46 treesize of output 36 [2021-06-05 14:17:33,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,376 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 30 treesize of output 24 [2021-06-05 14:17:33,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,386 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 48 treesize of output 38 [2021-06-05 14:17:33,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:17:33,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,405 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 28 treesize of output 22 [2021-06-05 14:17:33,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,412 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 30 treesize of output 24 [2021-06-05 14:17:33,414 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,651 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 14:17:33,652 INFO L628 ElimStorePlain]: treesize reduction 238, result has 53.4 percent of original size [2021-06-05 14:17:33,657 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 7 treesize of output 5 [2021-06-05 14:17:33,658 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:33,746 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 27 treesize of output 21 [2021-06-05 14:17:33,747 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:33,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:33,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,836 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 11 treesize of output 3 [2021-06-05 14:17:33,836 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,842 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 [2021-06-05 14:17:33,843 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:33,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:33,932 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:17:33,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,937 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 12 treesize of output 5 [2021-06-05 14:17:33,937 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:17:33,944 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:33,948 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:33,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:33,957 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 [2021-06-05 14:17:33,957 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:34,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:34,039 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 27 treesize of output 21 [2021-06-05 14:17:34,040 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:34,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:34,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:34,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:34,124 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 10 treesize of output 5 [2021-06-05 14:17:34,125 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:34,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:34,129 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 20 treesize of output 9 [2021-06-05 14:17:34,129 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:34,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:34,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:34,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:34,218 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-05 14:17:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622985797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:34,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:34,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:17:34,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163489930] [2021-06-05 14:17:34,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:34,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:34,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:34,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:34,398 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) [2021-06-05 14:17:35,261 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-06-05 14:17:35,587 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 107 [2021-06-05 14:17:35,768 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-06-05 14:17:35,978 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:17:36,202 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:17:36,427 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-05 14:17:36,670 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 14:17:36,906 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 14:17:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:36,969 INFO L93 Difference]: Finished difference Result 275 states and 766 transitions. [2021-06-05 14:17:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:17:36,969 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 [2021-06-05 14:17:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:36,970 INFO L225 Difference]: With dead ends: 275 [2021-06-05 14:17:36,971 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 14:17:36,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2620.8ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:17:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 14:17:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 161. [2021-06-05 14:17:36,974 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) [2021-06-05 14:17:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 469 transitions. [2021-06-05 14:17:36,974 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 469 transitions. Word has length 17 [2021-06-05 14:17:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:36,974 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 469 transitions. [2021-06-05 14:17:36,975 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) [2021-06-05 14:17:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 469 transitions. [2021-06-05 14:17:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:36,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:36,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:37,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:37,181 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1137200076, now seen corresponding path program 6 times [2021-06-05 14:17:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125465941] [2021-06-05 14:17:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:37,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125465941] [2021-06-05 14:17:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125465941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003115997] [2021-06-05 14:17:37,423 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 [2021-06-05 14:17:37,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:17:37,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,713 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 [2021-06-05 14:17:37,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:37,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,718 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 27 treesize of output 21 [2021-06-05 14:17:37,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:37,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:37,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:37,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:37,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:37,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,847 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 [2021-06-05 14:17:37,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:37,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:37,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:37,906 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. [2021-06-05 14:17:37,906 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:169, output treesize:145 [2021-06-05 14:17:38,223 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]} [2021-06-05 14:17:38,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:17:38,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:17:38,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,487 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-06-05 14:17:38,488 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-06-05 14:17:38,502 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 19 treesize of output 15 [2021-06-05 14:17:38,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:17:38,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,636 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 [2021-06-05 14:17:38,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:38,696 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:38,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:17:38,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,762 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 28 treesize of output 22 [2021-06-05 14:17:38,764 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,821 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 [2021-06-05 14:17:38,821 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,827 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 12 treesize of output 5 [2021-06-05 14:17:38,828 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:17:38,885 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:38,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,941 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:17:38,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-05 14:17:38,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:38,945 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:38,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:39,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:17:39,000 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:17:39,023 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:39,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:39,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:39,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:17:39,096 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-05 14:17:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:39,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003115997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:39,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:39,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:17:39,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471495340] [2021-06-05 14:17:39,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:39,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:39,160 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) [2021-06-05 14:17:39,848 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2021-06-05 14:17:40,436 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 134 [2021-06-05 14:17:40,792 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-05 14:17:40,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:40,869 INFO L93 Difference]: Finished difference Result 281 states and 779 transitions. [2021-06-05 14:17:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:17:40,869 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 [2021-06-05 14:17:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:40,871 INFO L225 Difference]: With dead ends: 281 [2021-06-05 14:17:40,871 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 14:17:40,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1844.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:17:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 14:17:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2021-06-05 14:17:40,874 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) [2021-06-05 14:17:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 484 transitions. [2021-06-05 14:17:40,875 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 484 transitions. Word has length 17 [2021-06-05 14:17:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:40,875 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 484 transitions. [2021-06-05 14:17:40,875 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) [2021-06-05 14:17:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 484 transitions. [2021-06-05 14:17:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:40,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:40,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:41,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 14:17:41,089 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1272047358, now seen corresponding path program 7 times [2021-06-05 14:17:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:41,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477290816] [2021-06-05 14:17:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:41,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:41,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477290816] [2021-06-05 14:17:41,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477290816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:41,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327472507] [2021-06-05 14:17:41,424 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 [2021-06-05 14:17:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:41,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:41,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:41,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,650 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 27 treesize of output 21 [2021-06-05 14:17:41,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:41,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,712 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 15 treesize of output 11 [2021-06-05 14:17:41,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:41,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:41,718 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 17 treesize of output 13 [2021-06-05 14:17:41,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:41,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:41,776 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. [2021-06-05 14:17:41,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-05 14:17:42,070 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:17:42,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,078 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 18 treesize of output 14 [2021-06-05 14:17:42,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,085 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 [2021-06-05 14:17:42,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,091 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 28 treesize of output 22 [2021-06-05 14:17:42,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:42,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,098 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 27 treesize of output 21 [2021-06-05 14:17:42,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,105 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 25 treesize of output 19 [2021-06-05 14:17:42,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,111 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 37 treesize of output 29 [2021-06-05 14:17:42,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:42,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:42,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,126 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 35 treesize of output 27 [2021-06-05 14:17:42,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:42,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:42,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:42,143 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,448 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-05 14:17:42,449 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-05 14:17:42,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,455 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 44 treesize of output 19 [2021-06-05 14:17:42,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,461 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 24 treesize of output 9 [2021-06-05 14:17:42,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:42,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,484 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 [2021-06-05 14:17:42,485 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,491 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 [2021-06-05 14:17:42,492 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,498 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 [2021-06-05 14:17:42,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:42,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,512 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 21 treesize of output 7 [2021-06-05 14:17:42,513 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,517 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 11 treesize of output 3 [2021-06-05 14:17:42,518 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:42,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,530 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 10 treesize of output 5 [2021-06-05 14:17:42,531 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,540 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 23 treesize of output 11 [2021-06-05 14:17:42,541 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,546 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 12 treesize of output 5 [2021-06-05 14:17:42,546 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:42,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:42,558 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 9 treesize of output 3 [2021-06-05 14:17:42,559 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:42,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:42,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:42,661 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-05 14:17:42,807 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:17:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:42,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327472507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:42,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:42,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140106126] [2021-06-05 14:17:42,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:42,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:42,889 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) [2021-06-05 14:17:43,530 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 14:17:43,725 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 14:17:43,904 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 14:17:44,120 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 14:17:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:44,187 INFO L93 Difference]: Finished difference Result 290 states and 824 transitions. [2021-06-05 14:17:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:17:44,187 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 [2021-06-05 14:17:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:44,188 INFO L225 Difference]: With dead ends: 290 [2021-06-05 14:17:44,188 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 14:17:44,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1537.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:17:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 14:17:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 170. [2021-06-05 14:17:44,191 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) [2021-06-05 14:17:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 493 transitions. [2021-06-05 14:17:44,192 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 493 transitions. Word has length 17 [2021-06-05 14:17:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:44,192 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 493 transitions. [2021-06-05 14:17:44,192 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) [2021-06-05 14:17:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 493 transitions. [2021-06-05 14:17:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:44,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:44,192 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:44,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 14:17:44,393 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1541682068, now seen corresponding path program 8 times [2021-06-05 14:17:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:44,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220856735] [2021-06-05 14:17:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220856735] [2021-06-05 14:17:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220856735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523356253] [2021-06-05 14:17:44,574 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 [2021-06-05 14:17:44,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:44,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:44,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,787 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 25 treesize of output 19 [2021-06-05 14:17:44,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:44,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:44,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,799 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 [2021-06-05 14:17:44,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:44,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:44,803 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 35 treesize of output 27 [2021-06-05 14:17:44,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:44,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:44,893 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. [2021-06-05 14:17:44,893 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:239 [2021-06-05 14:17:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:45,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:17:45,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,405 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-06-05 14:17:45,405 INFO L628 ElimStorePlain]: treesize reduction 196, result has 65.9 percent of original size [2021-06-05 14:17:45,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:45,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:45,523 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 14:17:45,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:45,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:45,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:45,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:45,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 14:17:45,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:45,667 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 27 treesize of output 21 [2021-06-05 14:17:45,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:45,780 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 14:17:45,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,787 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 28 treesize of output 22 [2021-06-05 14:17:45,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,793 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 30 treesize of output 24 [2021-06-05 14:17:45,794 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,800 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 28 treesize of output 22 [2021-06-05 14:17:45,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,807 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 48 treesize of output 38 [2021-06-05 14:17:45,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:17:45,815 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:45,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:45,819 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 30 treesize of output 24 [2021-06-05 14:17:45,820 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,002 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 14:17:46,002 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.0 percent of original size [2021-06-05 14:17:46,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,007 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 [2021-06-05 14:17:46,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,012 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 10 treesize of output 5 [2021-06-05 14:17:46,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:46,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:46,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:46,109 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,113 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 44 treesize of output 19 [2021-06-05 14:17:46,114 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:46,118 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:46,124 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 12 treesize of output 5 [2021-06-05 14:17:46,124 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,128 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 [2021-06-05 14:17:46,129 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:46,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:46,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-05 14:17:46,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:17:46,211 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:621, output treesize:139 [2021-06-05 14:17:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523356253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:46,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:46,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:17:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106518435] [2021-06-05 14:17:46,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:46,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:46,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:46,385 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) [2021-06-05 14:17:46,994 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-06-05 14:17:47,229 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 14:17:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:47,305 INFO L93 Difference]: Finished difference Result 272 states and 776 transitions. [2021-06-05 14:17:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:17:47,306 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 [2021-06-05 14:17:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:47,307 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:17:47,307 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:17:47,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1026.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:17:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:17:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 167. [2021-06-05 14:17:47,310 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) [2021-06-05 14:17:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-06-05 14:17:47,311 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-06-05 14:17:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:47,311 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-06-05 14:17:47,311 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) [2021-06-05 14:17:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-06-05 14:17:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:47,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:47,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:47,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:47,525 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -598492624, now seen corresponding path program 9 times [2021-06-05 14:17:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:47,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648877407] [2021-06-05 14:17:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:47,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:47,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648877407] [2021-06-05 14:17:47,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648877407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:47,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875318571] [2021-06-05 14:17:47,708 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 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 [2021-06-05 14:17:47,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:17:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:17:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:47,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,940 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 25 treesize of output 19 [2021-06-05 14:17:47,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:47,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,946 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 [2021-06-05 14:17:47,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:47,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:17:47,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:17:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:47,959 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 25 treesize of output 19 [2021-06-05 14:17:47,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:48,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:48,044 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. [2021-06-05 14:17:48,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:171, output treesize:231 [2021-06-05 14:17:48,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:48,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:48,418 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 15 treesize of output 11 [2021-06-05 14:17:48,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:48,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:17:48,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:48,739 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2021-06-05 14:17:48,740 INFO L628 ElimStorePlain]: treesize reduction 198, result has 65.9 percent of original size [2021-06-05 14:17:48,740 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:17:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:48,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:48,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:48,874 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 14:17:48,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:48,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:48,883 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 10 treesize of output 5 [2021-06-05 14:17:48,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:48,889 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 20 treesize of output 9 [2021-06-05 14:17:48,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:48,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,023 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 14:17:49,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:17:49,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,039 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 30 treesize of output 24 [2021-06-05 14:17:49,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,270 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-06-05 14:17:49,271 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-06-05 14:17:49,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,277 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 48 treesize of output 38 [2021-06-05 14:17:49,278 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,391 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 14:17:49,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:49,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:49,404 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,550 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 14:17:49,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,557 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 28 treesize of output 22 [2021-06-05 14:17:49,558 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,563 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 30 treesize of output 24 [2021-06-05 14:17:49,564 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,765 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-06-05 14:17:49,766 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.5 percent of original size [2021-06-05 14:17:49,771 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 27 treesize of output 21 [2021-06-05 14:17:49,772 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:49,874 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 14:17:49,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,880 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 11 treesize of output 3 [2021-06-05 14:17:49,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:49,886 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 [2021-06-05 14:17:49,886 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:49,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:49,995 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 14:17:49,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:50,014 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 44 treesize of output 19 [2021-06-05 14:17:50,016 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:50,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:50,120 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 30 treesize of output 24 [2021-06-05 14:17:50,121 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:50,308 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-05 14:17:50,308 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.0 percent of original size [2021-06-05 14:17:50,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:50,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:50,314 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:50,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:50,412 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 [2021-06-05 14:17:50,412 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:50,417 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 12 treesize of output 5 [2021-06-05 14:17:50,418 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:50,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:50,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:17:50,534 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 21 variables, input treesize:629, output treesize:167 [2021-06-05 14:17:50,709 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 14:17:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:50,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875318571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:50,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:50,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:17:50,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591904432] [2021-06-05 14:17:50,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:50,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:50,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:50,869 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) [2021-06-05 14:17:51,494 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-06-05 14:17:51,863 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-06-05 14:17:52,295 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 115 [2021-06-05 14:17:52,615 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2021-06-05 14:17:52,972 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 135 [2021-06-05 14:17:53,359 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 132 [2021-06-05 14:17:53,731 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 138 [2021-06-05 14:17:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:53,822 INFO L93 Difference]: Finished difference Result 379 states and 1027 transitions. [2021-06-05 14:17:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:17:53,822 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 [2021-06-05 14:17:53,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:53,824 INFO L225 Difference]: With dead ends: 379 [2021-06-05 14:17:53,824 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:17:53,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3059.1ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:17:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:17:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 168. [2021-06-05 14:17:53,827 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) [2021-06-05 14:17:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 496 transitions. [2021-06-05 14:17:53,828 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 496 transitions. Word has length 17 [2021-06-05 14:17:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:53,828 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 496 transitions. [2021-06-05 14:17:53,828 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) [2021-06-05 14:17:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 496 transitions. [2021-06-05 14:17:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:53,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:53,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:54,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 14:17:54,033 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1539622738, now seen corresponding path program 10 times [2021-06-05 14:17:54,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:54,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623648908] [2021-06-05 14:17:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:54,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623648908] [2021-06-05 14:17:54,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623648908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131557203] [2021-06-05 14:17:54,324 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 [2021-06-05 14:17:54,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:54,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:17:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:54,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:54,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:17:54,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:54,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:54,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,765 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 25 treesize of output 19 [2021-06-05 14:17:54,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,770 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 [2021-06-05 14:17:54,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:54,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:54,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,846 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 17 treesize of output 13 [2021-06-05 14:17:54,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:54,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:54,850 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 15 treesize of output 11 [2021-06-05 14:17:54,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:54,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:54,923 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. [2021-06-05 14:17:54,923 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-05 14:17:55,213 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]} [2021-06-05 14:17:55,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:55,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,226 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 [2021-06-05 14:17:55,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,395 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 14:17:55,395 INFO L628 ElimStorePlain]: treesize reduction 137, result has 61.8 percent of original size [2021-06-05 14:17:55,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:55,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:55,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:17:55,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:17:55,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:17:55,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,626 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 [2021-06-05 14:17:55,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,634 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 19 treesize of output 15 [2021-06-05 14:17:55,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,640 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 28 treesize of output 22 [2021-06-05 14:17:55,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_118 vanished before elimination [2021-06-05 14:17:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,700 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 [2021-06-05 14:17:55,700 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,704 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 20 treesize of output 9 [2021-06-05 14:17:55,705 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 14:17:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,767 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 [2021-06-05 14:17:55,768 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,822 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 [2021-06-05 14:17:55,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,826 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 11 treesize of output 3 [2021-06-05 14:17:55,827 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:17:55,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:55,836 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 24 treesize of output 9 [2021-06-05 14:17:55,837 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:55,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:55,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:17:55,887 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-06-05 14:17:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:55,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131557203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:55,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:55,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:55,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628301883] [2021-06-05 14:17:55,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:55,955 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) [2021-06-05 14:17:56,744 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-05 14:17:57,163 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 109 [2021-06-05 14:17:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:57,323 INFO L93 Difference]: Finished difference Result 276 states and 775 transitions. [2021-06-05 14:17:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:17:57,324 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 [2021-06-05 14:17:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:57,325 INFO L225 Difference]: With dead ends: 276 [2021-06-05 14:17:57,325 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:17:57,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1580.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:17:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:17:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2021-06-05 14:17:57,328 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) [2021-06-05 14:17:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-06-05 14:17:57,329 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-06-05 14:17:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-06-05 14:17:57,329 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) [2021-06-05 14:17:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-06-05 14:17:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:17:57,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:57,330 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:57,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 14:17:57,541 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:17:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1020683452, now seen corresponding path program 11 times [2021-06-05 14:17:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381890244] [2021-06-05 14:17:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:57,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381890244] [2021-06-05 14:17:57,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381890244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:57,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75821245] [2021-06-05 14:17:57,741 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 [2021-06-05 14:17:57,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:17:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:17:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:57,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:57,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,864 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 15 treesize of output 11 [2021-06-05 14:17:57,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:17:57,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:57,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:17:57,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:57,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:57,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:17:57,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:17:58,554 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]} [2021-06-05 14:17:58,561 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 19 treesize of output 15 [2021-06-05 14:17:58,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:58,568 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 21 treesize of output 17 [2021-06-05 14:17:58,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:58,820 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-06-05 14:17:58,821 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-06-05 14:17:58,825 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 30 treesize of output 24 [2021-06-05 14:17:58,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:58,831 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 28 treesize of output 22 [2021-06-05 14:17:58,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:58,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:58,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:17:58,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:17:58,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:58,949 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 19 treesize of output 15 [2021-06-05 14:17:58,949 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:17:59,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,068 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 7 treesize of output 5 [2021-06-05 14:17:59,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,128 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 [2021-06-05 14:17:59,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,132 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 11 treesize of output 3 [2021-06-05 14:17:59,133 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,195 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 24 treesize of output 9 [2021-06-05 14:17:59,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:17:59,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,257 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 10 treesize of output 5 [2021-06-05 14:17:59,258 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,261 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 20 treesize of output 9 [2021-06-05 14:17:59,262 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:17:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:17:59,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:17:59,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:17:59,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 14:17:59,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 14:17:59,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:17:59,379 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-05 14:17:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:17:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75821245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:59,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:59,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:17:59,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746294439] [2021-06-05 14:17:59,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:17:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:17:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:17:59,428 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) [2021-06-05 14:17:59,925 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 14:18:00,273 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2021-06-05 14:18:00,530 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 14:18:01,094 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 131 [2021-06-05 14:18:01,486 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2021-06-05 14:18:01,725 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 14:18:02,136 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2021-06-05 14:18:02,510 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-06-05 14:18:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:02,627 INFO L93 Difference]: Finished difference Result 339 states and 928 transitions. [2021-06-05 14:18:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:18:02,627 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 [2021-06-05 14:18:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:02,629 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:18:02,629 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 14:18:02,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3316.6ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:18:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 14:18:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 161. [2021-06-05 14:18:02,632 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) [2021-06-05 14:18:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-06-05 14:18:02,632 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-06-05 14:18:02,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:02,632 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-06-05 14:18:02,632 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) [2021-06-05 14:18:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-06-05 14:18:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:02,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:02,633 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:02,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 14:18:02,833 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1496339310, now seen corresponding path program 12 times [2021-06-05 14:18:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:02,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493677362] [2021-06-05 14:18:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:03,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493677362] [2021-06-05 14:18:03,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493677362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440531137] [2021-06-05 14:18:03,090 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 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 [2021-06-05 14:18:03,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:18:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:18:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:03,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:03,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:03,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:03,417 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 14:18:03,417 INFO L628 ElimStorePlain]: treesize reduction 32, result has 82.1 percent of original size [2021-06-05 14:18:03,421 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 [2021-06-05 14:18:03,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,468 INFO L628 ElimStorePlain]: treesize reduction 82, result has 41.4 percent of original size [2021-06-05 14:18:03,468 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-05 14:18:03,471 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. [2021-06-05 14:18:03,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:58 [2021-06-05 14:18:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,635 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 25 treesize of output 19 [2021-06-05 14:18:03,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:03,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:03,743 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 14:18:03,744 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-06-05 14:18:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,749 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 11 treesize of output 3 [2021-06-05 14:18:03,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:03,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,830 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 [2021-06-05 14:18:03,830 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,833 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 20 treesize of output 16 [2021-06-05 14:18:03,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,871 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 10 treesize of output 5 [2021-06-05 14:18:03,872 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,875 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 12 treesize of output 5 [2021-06-05 14:18:03,876 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,915 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 [2021-06-05 14:18:03,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:18:03,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,962 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 9 treesize of output 3 [2021-06-05 14:18:03,963 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:03,965 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 [2021-06-05 14:18:03,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:03,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:03,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:18:03,995 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-05 14:18:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:04,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440531137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:04,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:04,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:18:04,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433853089] [2021-06-05 14:18:04,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:04,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:04,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:04,036 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) [2021-06-05 14:18:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:04,609 INFO L93 Difference]: Finished difference Result 223 states and 624 transitions. [2021-06-05 14:18:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:04,609 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 [2021-06-05 14:18:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:04,610 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:18:04,610 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:18:04,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:18:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:18:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-06-05 14:18:04,612 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) [2021-06-05 14:18:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-06-05 14:18:04,613 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-06-05 14:18:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:04,613 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-06-05 14:18:04,613 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) [2021-06-05 14:18:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-06-05 14:18:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:04,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:04,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:04,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:04,814 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:04,814 INFO L82 PathProgramCache]: Analyzing trace with hash 849561632, now seen corresponding path program 13 times [2021-06-05 14:18:04,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:04,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351954041] [2021-06-05 14:18:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:05,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:05,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351954041] [2021-06-05 14:18:05,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351954041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:05,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052767777] [2021-06-05 14:18:05,090 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 [2021-06-05 14:18:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:05,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,314 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 15 treesize of output 11 [2021-06-05 14:18:05,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:18:05,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,363 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 27 treesize of output 21 [2021-06-05 14:18:05,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:05,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,367 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 25 treesize of output 19 [2021-06-05 14:18:05,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:05,415 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. [2021-06-05 14:18:05,415 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-05 14:18:05,712 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:18:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,717 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 [2021-06-05 14:18:05,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,723 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 [2021-06-05 14:18:05,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,731 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 [2021-06-05 14:18:05,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,738 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 [2021-06-05 14:18:05,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,745 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 [2021-06-05 14:18:05,746 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:18:05,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,758 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 28 treesize of output 22 [2021-06-05 14:18:05,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:05,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:18:05,764 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:05,769 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 37 treesize of output 29 [2021-06-05 14:18:05,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:05,775 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 [2021-06-05 14:18:05,776 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,015 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-05 14:18:06,015 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-05 14:18:06,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:18:06,021 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,026 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 [2021-06-05 14:18:06,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:06,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,043 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 9 treesize of output 3 [2021-06-05 14:18:06,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,048 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 23 treesize of output 11 [2021-06-05 14:18:06,049 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,053 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 12 treesize of output 5 [2021-06-05 14:18:06,054 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,066 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 20 treesize of output 9 [2021-06-05 14:18:06,066 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,071 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 10 treesize of output 5 [2021-06-05 14:18:06,071 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,076 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 21 treesize of output 7 [2021-06-05 14:18:06,076 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,081 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 11 treesize of output 3 [2021-06-05 14:18:06,081 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:06,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,093 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 21 treesize of output 7 [2021-06-05 14:18:06,094 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:06,097 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 11 treesize of output 3 [2021-06-05 14:18:06,098 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:06,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:06,208 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 14:18:06,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:06,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:06,212 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-05 14:18:06,357 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:18:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052767777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:06,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:06,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:06,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087069280] [2021-06-05 14:18:06,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:06,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:06,419 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) [2021-06-05 14:18:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:07,243 INFO L93 Difference]: Finished difference Result 217 states and 631 transitions. [2021-06-05 14:18:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:18:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:18:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:07,245 INFO L225 Difference]: With dead ends: 217 [2021-06-05 14:18:07,245 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:18:07,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1051.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:18:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:18:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-06-05 14:18:07,247 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) [2021-06-05 14:18:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-06-05 14:18:07,247 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-06-05 14:18:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:07,247 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-06-05 14:18:07,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-06-05 14:18:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:07,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:07,248 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:07,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 14:18:07,448 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1964167794, now seen corresponding path program 14 times [2021-06-05 14:18:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:07,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918811882] [2021-06-05 14:18:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:07,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:07,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918811882] [2021-06-05 14:18:07,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918811882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:07,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076511989] [2021-06-05 14:18:07,638 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 [2021-06-05 14:18:07,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:07,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:07,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,897 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 15 treesize of output 11 [2021-06-05 14:18:07,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:07,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,902 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 25 treesize of output 19 [2021-06-05 14:18:07,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,907 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 35 treesize of output 27 [2021-06-05 14:18:07,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:07,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:07,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:07,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:07,985 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. [2021-06-05 14:18:07,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:183, output treesize:243 [2021-06-05 14:18:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,195 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 28 treesize of output 22 [2021-06-05 14:18:08,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,202 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 30 treesize of output 24 [2021-06-05 14:18:08,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,213 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 48 treesize of output 38 [2021-06-05 14:18:08,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,223 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 28 treesize of output 22 [2021-06-05 14:18:08,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,231 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 46 treesize of output 36 [2021-06-05 14:18:08,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,240 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 28 treesize of output 22 [2021-06-05 14:18:08,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,248 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 30 treesize of output 24 [2021-06-05 14:18:08,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:18:08,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,505 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-06-05 14:18:08,505 INFO L628 ElimStorePlain]: treesize reduction 253, result has 53.0 percent of original size [2021-06-05 14:18:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,510 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 [2021-06-05 14:18:08,511 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,515 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 12 treesize of output 5 [2021-06-05 14:18:08,516 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,520 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 12 treesize of output 5 [2021-06-05 14:18:08,521 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,526 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 [2021-06-05 14:18:08,527 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,531 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 44 treesize of output 19 [2021-06-05 14:18:08,532 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,615 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 27 treesize of output 21 [2021-06-05 14:18:08,616 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:08,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:08,706 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:08,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,794 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 11 treesize of output 3 [2021-06-05 14:18:08,795 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,798 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 [2021-06-05 14:18:08,799 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:08,891 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 10 treesize of output 5 [2021-06-05 14:18:08,892 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:18:08,896 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:08,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:08,988 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 7 treesize of output 5 [2021-06-05 14:18:08,989 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:09,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:09,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-06-05 14:18:09,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:09,071 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-06-05 14:18:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076511989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:09,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:09,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:18:09,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209408234] [2021-06-05 14:18:09,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:09,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:09,248 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) [2021-06-05 14:18:10,096 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2021-06-05 14:18:10,353 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-05 14:18:10,553 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 116 [2021-06-05 14:18:10,753 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 14:18:11,168 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 14:18:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:11,241 INFO L93 Difference]: Finished difference Result 237 states and 659 transitions. [2021-06-05 14:18:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:18:11,241 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 [2021-06-05 14:18:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:11,242 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:18:11,242 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:18:11,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1952.3ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:18:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:18:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 169. [2021-06-05 14:18:11,245 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) [2021-06-05 14:18:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-06-05 14:18:11,245 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-06-05 14:18:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:11,246 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-06-05 14:18:11,246 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) [2021-06-05 14:18:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-06-05 14:18:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:11,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:11,246 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:11,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:11,457 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1751800366, now seen corresponding path program 15 times [2021-06-05 14:18:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:11,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510631718] [2021-06-05 14:18:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:11,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:11,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510631718] [2021-06-05 14:18:11,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510631718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:11,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178549673] [2021-06-05 14:18:11,754 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 [2021-06-05 14:18:11,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:18:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:18:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:11,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,857 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 [2021-06-05 14:18:11,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:11,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,861 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 35 treesize of output 27 [2021-06-05 14:18:11,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,866 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 15 treesize of output 11 [2021-06-05 14:18:11,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:11,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:11,872 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 [2021-06-05 14:18:11,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:11,965 INFO L628 ElimStorePlain]: treesize reduction 84, result has 63.3 percent of original size [2021-06-05 14:18:11,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:11,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:145 [2021-06-05 14:18:12,240 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_171, v_prenex_173, array_4], 1=[v_prenex_170, array_0, v_prenex_172]} [2021-06-05 14:18:12,243 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 20 treesize of output 16 [2021-06-05 14:18:12,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:18:12,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,315 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-06-05 14:18:12,318 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 17 treesize of output 13 [2021-06-05 14:18:12,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:18:12,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,351 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 27 treesize of output 21 [2021-06-05 14:18:12,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:12,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,388 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 10 treesize of output 5 [2021-06-05 14:18:12,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,391 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 12 treesize of output 5 [2021-06-05 14:18:12,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,426 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 21 treesize of output 7 [2021-06-05 14:18:12,426 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:12,429 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,468 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 11 treesize of output 3 [2021-06-05 14:18:12,468 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 14:18:12,471 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:12,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:12,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:18:12,500 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-05 14:18:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178549673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:12,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:12,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822802007] [2021-06-05 14:18:12,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:12,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:12,542 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) [2021-06-05 14:18:12,856 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 14:18:13,046 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-06-05 14:18:13,271 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-05 14:18:13,480 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 14:18:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:13,525 INFO L93 Difference]: Finished difference Result 292 states and 821 transitions. [2021-06-05 14:18:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:13,525 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 [2021-06-05 14:18:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:13,526 INFO L225 Difference]: With dead ends: 292 [2021-06-05 14:18:13,526 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 14:18:13,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1148.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:18:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 14:18:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 173. [2021-06-05 14:18:13,529 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) [2021-06-05 14:18:13,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 517 transitions. [2021-06-05 14:18:13,529 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 517 transitions. Word has length 17 [2021-06-05 14:18:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:13,529 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 517 transitions. [2021-06-05 14:18:13,529 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) [2021-06-05 14:18:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 517 transitions. [2021-06-05 14:18:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:13,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:13,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:13,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 14:18:13,730 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1070448410, now seen corresponding path program 16 times [2021-06-05 14:18:13,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:13,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382830966] [2021-06-05 14:18:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:14,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382830966] [2021-06-05 14:18:14,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382830966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:14,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370353082] [2021-06-05 14:18:14,058 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 [2021-06-05 14:18:14,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:18:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:18:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,161 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 [2021-06-05 14:18:14,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:14,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,165 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 [2021-06-05 14:18:14,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:14,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:18:14,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:14,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:14,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:14,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:14,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:14,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:14,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:247 [2021-06-05 14:18:14,924 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]} [2021-06-05 14:18:14,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:14,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:14,938 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 27 treesize of output 21 [2021-06-05 14:18:14,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,045 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-06-05 14:18:15,046 INFO L628 ElimStorePlain]: treesize reduction 226, result has 36.7 percent of original size [2021-06-05 14:18:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:15,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,076 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-06-05 14:18:15,076 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:18:15,079 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 27 treesize of output 21 [2021-06-05 14:18:15,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:15,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:15,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:15,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,155 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 20 treesize of output 9 [2021-06-05 14:18:15,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,194 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 20 treesize of output 9 [2021-06-05 14:18:15,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,230 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:18:15,230 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-06-05 14:18:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:15,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:15,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,288 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 [2021-06-05 14:18:15,289 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:15,292 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 11 treesize of output 3 [2021-06-05 14:18:15,292 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:15,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:15,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:18:15,334 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:369, output treesize:52 [2021-06-05 14:18:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370353082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:15,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:15,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:15,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988644955] [2021-06-05 14:18:15,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:15,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:15,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:15,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:15,382 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) [2021-06-05 14:18:15,801 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 14:18:16,119 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-06-05 14:18:16,370 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 75 [2021-06-05 14:18:16,636 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-05 14:18:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:16,722 INFO L93 Difference]: Finished difference Result 276 states and 795 transitions. [2021-06-05 14:18:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:16,722 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 [2021-06-05 14:18:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:16,723 INFO L225 Difference]: With dead ends: 276 [2021-06-05 14:18:16,723 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 14:18:16,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1783.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:18:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 14:18:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2021-06-05 14:18:16,726 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) [2021-06-05 14:18:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-06-05 14:18:16,727 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-06-05 14:18:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:16,727 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-06-05 14:18:16,727 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) [2021-06-05 14:18:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-06-05 14:18:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:16,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:16,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 14:18:16,928 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1402703998, now seen corresponding path program 17 times [2021-06-05 14:18:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:16,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844724394] [2021-06-05 14:18:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:17,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844724394] [2021-06-05 14:18:17,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844724394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229191200] [2021-06-05 14:18:17,147 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 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 [2021-06-05 14:18:17,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:17,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:18:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:17,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,309 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 [2021-06-05 14:18:17,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:17,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,314 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 27 treesize of output 21 [2021-06-05 14:18:17,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,321 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 [2021-06-05 14:18:17,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:17,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:17,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:18:17,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:17,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:17,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:17,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:175, output treesize:165 [2021-06-05 14:18:17,928 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]} [2021-06-05 14:18:17,934 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 [2021-06-05 14:18:17,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:17,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:17,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,118 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2021-06-05 14:18:18,118 INFO L628 ElimStorePlain]: treesize reduction 139, result has 63.0 percent of original size [2021-06-05 14:18:18,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:18,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,194 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 19 treesize of output 15 [2021-06-05 14:18:18,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:18,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,338 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 28 treesize of output 22 [2021-06-05 14:18:18,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,342 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 30 treesize of output 24 [2021-06-05 14:18:18,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:18:18,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,409 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 19 treesize of output 15 [2021-06-05 14:18:18,409 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,462 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-06-05 14:18:18,462 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-06-05 14:18:18,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:18,467 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:18,525 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:18:18,529 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:18:18,586 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,589 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 11 treesize of output 3 [2021-06-05 14:18:18,590 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,654 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 10 treesize of output 5 [2021-06-05 14:18:18,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:18,658 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 20 treesize of output 9 [2021-06-05 14:18:18,659 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:18,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:18,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:18:18,718 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:374, output treesize:66 [2021-06-05 14:18:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:18,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229191200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:18,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:18,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:18,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349211881] [2021-06-05 14:18:18,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:18,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:18,768 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) [2021-06-05 14:18:19,212 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-06-05 14:18:19,592 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 102 [2021-06-05 14:18:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:19,668 INFO L93 Difference]: Finished difference Result 208 states and 594 transitions. [2021-06-05 14:18:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:19,669 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 [2021-06-05 14:18:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:19,669 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:18:19,669 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:18:19,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1249.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:18:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:18:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 168. [2021-06-05 14:18:19,672 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) [2021-06-05 14:18:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 497 transitions. [2021-06-05 14:18:19,673 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 497 transitions. Word has length 17 [2021-06-05 14:18:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:19,673 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 497 transitions. [2021-06-05 14:18:19,673 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) [2021-06-05 14:18:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 497 transitions. [2021-06-05 14:18:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:19,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:19,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:19,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:19,897 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash 736700478, now seen corresponding path program 18 times [2021-06-05 14:18:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:19,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188928346] [2021-06-05 14:18:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:20,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188928346] [2021-06-05 14:18:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188928346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:20,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904311949] [2021-06-05 14:18:20,242 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 [2021-06-05 14:18:20,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:18:20,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:20,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,379 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 [2021-06-05 14:18:20,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,383 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 27 treesize of output 21 [2021-06-05 14:18:20,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,388 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 17 treesize of output 13 [2021-06-05 14:18:20,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,392 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 25 treesize of output 19 [2021-06-05 14:18:20,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:20,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:20,445 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:181 [2021-06-05 14:18:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,707 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 25 treesize of output 19 [2021-06-05 14:18:20,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,715 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 [2021-06-05 14:18:20,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,959 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 14:18:20,959 INFO L628 ElimStorePlain]: treesize reduction 104, result has 78.0 percent of original size [2021-06-05 14:18:20,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-06-05 14:18:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:20,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:20,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,971 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 38 treesize of output 30 [2021-06-05 14:18:20,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,977 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 19 treesize of output 15 [2021-06-05 14:18:20,978 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:20,983 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 28 treesize of output 22 [2021-06-05 14:18:20,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,101 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 14:18:21,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,106 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 24 treesize of output 9 [2021-06-05 14:18:21,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,112 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 12 treesize of output 5 [2021-06-05 14:18:21,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,126 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 11 treesize of output 3 [2021-06-05 14:18:21,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:21,132 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,137 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 24 treesize of output 9 [2021-06-05 14:18:21,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,142 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 46 treesize of output 15 [2021-06-05 14:18:21,142 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,265 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 14:18:21,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,269 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 [2021-06-05 14:18:21,270 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:21,386 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 14:18:21,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,392 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 [2021-06-05 14:18:21,392 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,396 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 20 treesize of output 9 [2021-06-05 14:18:21,397 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,518 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 14:18:21,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:21,524 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:21,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,536 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 17 treesize of output 13 [2021-06-05 14:18:21,537 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,648 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 14:18:21,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,654 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 [2021-06-05 14:18:21,655 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,659 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 [2021-06-05 14:18:21,660 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:21,671 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 9 treesize of output 3 [2021-06-05 14:18:21,672 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:21,781 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 14:18:21,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:21,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:21,785 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:486, output treesize:219 [2021-06-05 14:18:21,953 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 14:18:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:22,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904311949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:22,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:22,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:18:22,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926185117] [2021-06-05 14:18:22,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:22,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:22,042 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) [2021-06-05 14:18:22,572 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-06-05 14:18:22,756 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 14:18:22,952 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 14:18:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:23,010 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-06-05 14:18:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:23,011 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 [2021-06-05 14:18:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:23,011 INFO L225 Difference]: With dead ends: 217 [2021-06-05 14:18:23,011 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:18:23,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1332.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:18:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:18:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 163. [2021-06-05 14:18:23,014 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) [2021-06-05 14:18:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-06-05 14:18:23,014 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-06-05 14:18:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:23,014 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-06-05 14:18:23,014 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) [2021-06-05 14:18:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-06-05 14:18:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:23,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:23,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:23,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-05 14:18:23,217 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1308901226, now seen corresponding path program 19 times [2021-06-05 14:18:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:23,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747935767] [2021-06-05 14:18:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:23,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747935767] [2021-06-05 14:18:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747935767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495821682] [2021-06-05 14:18:23,516 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 [2021-06-05 14:18:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,651 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 [2021-06-05 14:18:23,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:23,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:23,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:23,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,662 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 [2021-06-05 14:18:23,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:23,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:23,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:18:23,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:23,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:23,706 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. [2021-06-05 14:18:23,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:115, output treesize:103 [2021-06-05 14:18:24,080 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-05 14:18:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,086 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 17 treesize of output 13 [2021-06-05 14:18:24,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,092 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 [2021-06-05 14:18:24,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,097 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 27 treesize of output 21 [2021-06-05 14:18:24,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:24,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:24,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,114 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 37 treesize of output 29 [2021-06-05 14:18:24,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,119 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 27 treesize of output 21 [2021-06-05 14:18:24,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:24,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,125 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 35 treesize of output 27 [2021-06-05 14:18:24,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,131 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 18 treesize of output 14 [2021-06-05 14:18:24,132 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:18:24,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:24,385 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-06-05 14:18:24,385 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-06-05 14:18:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,390 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 9 treesize of output 3 [2021-06-05 14:18:24,391 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:18:24,396 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,401 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 23 treesize of output 11 [2021-06-05 14:18:24,402 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:24,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,415 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 [2021-06-05 14:18:24,416 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,420 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 21 treesize of output 7 [2021-06-05 14:18:24,421 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,433 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 20 treesize of output 9 [2021-06-05 14:18:24,434 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,439 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 24 treesize of output 9 [2021-06-05 14:18:24,439 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:18:24,444 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,461 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 10 treesize of output 5 [2021-06-05 14:18:24,461 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:24,466 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:24,471 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:24,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:24,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:24,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:24,581 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:403, output treesize:179 [2021-06-05 14:18:24,728 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:18:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:24,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495821682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:24,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:24,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:24,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991154898] [2021-06-05 14:18:24,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:24,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:24,786 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) [2021-06-05 14:18:25,283 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 14:18:25,578 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-06-05 14:18:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:25,641 INFO L93 Difference]: Finished difference Result 235 states and 676 transitions. [2021-06-05 14:18:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:18:25,641 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 [2021-06-05 14:18:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:25,642 INFO L225 Difference]: With dead ends: 235 [2021-06-05 14:18:25,642 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 14:18:25,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1219.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:18:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 14:18:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-06-05 14:18:25,645 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) [2021-06-05 14:18:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-06-05 14:18:25,645 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-06-05 14:18:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:25,645 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-06-05 14:18:25,645 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) [2021-06-05 14:18:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-06-05 14:18:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:25,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:25,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:25,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:25,846 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:25,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2024967756, now seen corresponding path program 20 times [2021-06-05 14:18:25,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:25,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472806590] [2021-06-05 14:18:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:26,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:26,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472806590] [2021-06-05 14:18:26,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472806590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:26,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255704588] [2021-06-05 14:18:26,058 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 [2021-06-05 14:18:26,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:26,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:26,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:26,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:26,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,221 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 15 treesize of output 11 [2021-06-05 14:18:26,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:26,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:26,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:26,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:26,230 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 35 treesize of output 27 [2021-06-05 14:18:26,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:26,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:26,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:26,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:221 [2021-06-05 14:18:26,764 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]} [2021-06-05 14:18:26,770 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 29 treesize of output 23 [2021-06-05 14:18:26,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:26,775 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 27 treesize of output 21 [2021-06-05 14:18:26,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:26,886 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-06-05 14:18:26,886 INFO L628 ElimStorePlain]: treesize reduction 128, result has 57.8 percent of original size [2021-06-05 14:18:26,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:26,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:26,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:26,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:26,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:26,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,047 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 [2021-06-05 14:18:27,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,098 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 20 treesize of output 9 [2021-06-05 14:18:27,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,103 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 24 treesize of output 9 [2021-06-05 14:18:27,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,152 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 [2021-06-05 14:18:27,153 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:27,157 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,211 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 11 treesize of output 3 [2021-06-05 14:18:27,212 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:27,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:27,268 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 [2021-06-05 14:18:27,269 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:27,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:27,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-05 14:18:27,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:27,321 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-06-05 14:18:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:27,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255704588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:27,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:27,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37392810] [2021-06-05 14:18:27,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:27,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:27,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:27,370 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) [2021-06-05 14:18:27,821 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-05 14:18:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:27,895 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-06-05 14:18:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:18:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:27,897 INFO L225 Difference]: With dead ends: 198 [2021-06-05 14:18:27,897 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 14:18:27,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 837.1ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 14:18:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 171. [2021-06-05 14:18:27,899 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) [2021-06-05 14:18:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 503 transitions. [2021-06-05 14:18:27,900 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 503 transitions. Word has length 17 [2021-06-05 14:18:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:27,900 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 503 transitions. [2021-06-05 14:18:27,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 503 transitions. [2021-06-05 14:18:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:27,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:27,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:28,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 14:18:28,109 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:28,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2023379368, now seen corresponding path program 21 times [2021-06-05 14:18:28,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:28,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940616643] [2021-06-05 14:18:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:28,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:28,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940616643] [2021-06-05 14:18:28,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940616643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:28,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054080330] [2021-06-05 14:18:28,306 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 [2021-06-05 14:18:28,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:18:28,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:28,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:28,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:28,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:28,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:28,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:18:28,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:28,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:28,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:28,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-06-05 14:18:28,620 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]} [2021-06-05 14:18:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 14:18:28,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,630 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 [2021-06-05 14:18:28,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,635 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 27 treesize of output 21 [2021-06-05 14:18:28,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:28,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,648 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 45 treesize of output 35 [2021-06-05 14:18:28,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:18:28,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:28,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:18:28,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,823 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 14:18:28,824 INFO L628 ElimStorePlain]: treesize reduction 186, result has 57.8 percent of original size [2021-06-05 14:18:28,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:28,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:28,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:28,898 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:28,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:28,972 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 27 treesize of output 21 [2021-06-05 14:18:28,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:29,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:18:29,057 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,061 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 20 treesize of output 9 [2021-06-05 14:18:29,062 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,066 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 [2021-06-05 14:18:29,066 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,070 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 46 treesize of output 15 [2021-06-05 14:18:29,071 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,074 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 12 treesize of output 5 [2021-06-05 14:18:29,074 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,148 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-05 14:18:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,152 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 [2021-06-05 14:18:29,153 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:29,156 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,236 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 [2021-06-05 14:18:29,237 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:29,240 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 [2021-06-05 14:18:29,240 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:29,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:29,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:29,317 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:555, output treesize:159 [2021-06-05 14:18:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:29,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054080330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:29,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:29,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:18:29,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961535825] [2021-06-05 14:18:29,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:29,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:29,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:29,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:29,470 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) [2021-06-05 14:18:29,929 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 14:18:30,148 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 14:18:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:30,200 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-06-05 14:18:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:18:30,200 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 [2021-06-05 14:18:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:30,201 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:18:30,201 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:18:30,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 889.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:18:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2021-06-05 14:18:30,203 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) [2021-06-05 14:18:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-06-05 14:18:30,204 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-06-05 14:18:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:30,204 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-06-05 14:18:30,204 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) [2021-06-05 14:18:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-06-05 14:18:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:30,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:30,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:30,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-05 14:18:30,421 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2098340236, now seen corresponding path program 22 times [2021-06-05 14:18:30,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:30,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010023264] [2021-06-05 14:18:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:30,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:30,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010023264] [2021-06-05 14:18:30,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010023264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:30,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040168162] [2021-06-05 14:18:30,604 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 [2021-06-05 14:18:30,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:18:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:30,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:18:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:30,730 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 [2021-06-05 14:18:30,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:30,733 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 27 treesize of output 21 [2021-06-05 14:18:30,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:30,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:30,786 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 15 treesize of output 11 [2021-06-05 14:18:30,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:30,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:30,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:30,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:30,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:30,849 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-06-05 14:18:30,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,963 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 38 treesize of output 30 [2021-06-05 14:18:30,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:30,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,969 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 35 treesize of output 27 [2021-06-05 14:18:30,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,976 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 25 treesize of output 19 [2021-06-05 14:18:30,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:30,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,983 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 28 treesize of output 22 [2021-06-05 14:18:30,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:30,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,989 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 35 treesize of output 27 [2021-06-05 14:18:30,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:30,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:30,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,003 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 [2021-06-05 14:18:31,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,010 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 19 treesize of output 15 [2021-06-05 14:18:31,010 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,016 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 25 treesize of output 19 [2021-06-05 14:18:31,017 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:31,021 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,199 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-06-05 14:18:31,199 INFO L628 ElimStorePlain]: treesize reduction 375, result has 39.3 percent of original size [2021-06-05 14:18:31,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,203 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 21 treesize of output 7 [2021-06-05 14:18:31,203 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,210 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 20 treesize of output 9 [2021-06-05 14:18:31,211 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,215 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 20 treesize of output 9 [2021-06-05 14:18:31,216 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:31,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,229 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 21 treesize of output 7 [2021-06-05 14:18:31,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:31,235 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:31,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,248 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 [2021-06-05 14:18:31,248 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:31,252 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 12 treesize of output 5 [2021-06-05 14:18:31,252 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:31,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:31,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:18:31,342 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-06-05 14:18:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040168162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:31,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:31,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:18:31,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879617535] [2021-06-05 14:18:31,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:31,534 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) [2021-06-05 14:18:31,910 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-05 14:18:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:31,970 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-06-05 14:18:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:18:31,970 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 [2021-06-05 14:18:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:31,971 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:18:31,971 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 14:18:31,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:18:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 14:18:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-06-05 14:18:31,974 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) [2021-06-05 14:18:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-06-05 14:18:31,974 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-06-05 14:18:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:31,975 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-06-05 14:18:31,975 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) [2021-06-05 14:18:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-06-05 14:18:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:31,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:31,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:32,189 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1062058060, now seen corresponding path program 23 times [2021-06-05 14:18:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:32,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492046377] [2021-06-05 14:18:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:32,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:32,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492046377] [2021-06-05 14:18:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492046377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221664906] [2021-06-05 14:18:32,402 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 [2021-06-05 14:18:32,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:18:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:32,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,715 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 [2021-06-05 14:18:32,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,720 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 [2021-06-05 14:18:32,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:32,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:32,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:32,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:32,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,812 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 [2021-06-05 14:18:32,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:32,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:32,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:32,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:32,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:32,898 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 15 treesize of output 11 [2021-06-05 14:18:32,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:32,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:32,979 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. [2021-06-05 14:18:32,979 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:262, output treesize:236 [2021-06-05 14:18:33,302 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-05 14:18:33,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,309 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 [2021-06-05 14:18:33,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,315 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 [2021-06-05 14:18:33,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,322 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 15 treesize of output 11 [2021-06-05 14:18:33,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,328 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 35 treesize of output 27 [2021-06-05 14:18:33,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,335 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 37 treesize of output 29 [2021-06-05 14:18:33,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:33,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,343 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 35 treesize of output 27 [2021-06-05 14:18:33,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:33,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:33,352 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,359 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 18 treesize of output 14 [2021-06-05 14:18:33,360 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,369 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 28 treesize of output 22 [2021-06-05 14:18:33,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:33,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:33,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:33,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,395 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 27 treesize of output 21 [2021-06-05 14:18:33,395 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,714 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2021-06-05 14:18:33,715 INFO L628 ElimStorePlain]: treesize reduction 337, result has 55.5 percent of original size [2021-06-05 14:18:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-05 14:18:33,722 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,727 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 12 treesize of output 5 [2021-06-05 14:18:33,728 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:33,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,743 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 21 treesize of output 7 [2021-06-05 14:18:33,744 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,749 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 [2021-06-05 14:18:33,750 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:33,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,763 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 24 treesize of output 9 [2021-06-05 14:18:33,764 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,769 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 44 treesize of output 19 [2021-06-05 14:18:33,769 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:33,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,787 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 10 treesize of output 5 [2021-06-05 14:18:33,787 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,792 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 21 treesize of output 7 [2021-06-05 14:18:33,793 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,804 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 [2021-06-05 14:18:33,805 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:33,817 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 20 treesize of output 9 [2021-06-05 14:18:33,817 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:33,931 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 14:18:33,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:33,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:33,936 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 7 variables, input treesize:603, output treesize:241 [2021-06-05 14:18:34,112 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-05 14:18:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221664906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:34,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:34,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:18:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412245382] [2021-06-05 14:18:34,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:18:34,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:18:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:18:34,204 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) [2021-06-05 14:18:34,507 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 14:18:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:34,769 INFO L93 Difference]: Finished difference Result 219 states and 627 transitions. [2021-06-05 14:18:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:34,769 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 [2021-06-05 14:18:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:34,770 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:18:34,770 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 14:18:34,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1036.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 14:18:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2021-06-05 14:18:34,773 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) [2021-06-05 14:18:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-05 14:18:34,773 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-05 14:18:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:34,774 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-05 14:18:34,774 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) [2021-06-05 14:18:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-05 14:18:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:34,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:34,774 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:34,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-06-05 14:18:34,994 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 419179810, now seen corresponding path program 24 times [2021-06-05 14:18:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:34,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784729390] [2021-06-05 14:18:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:35,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784729390] [2021-06-05 14:18:35,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784729390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489060063] [2021-06-05 14:18:35,306 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 [2021-06-05 14:18:35,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:18:35,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:18:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:35,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,555 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 [2021-06-05 14:18:35,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:35,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,632 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 [2021-06-05 14:18:35,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:35,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,636 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 17 treesize of output 13 [2021-06-05 14:18:35,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:35,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,712 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 [2021-06-05 14:18:35,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:35,716 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 [2021-06-05 14:18:35,717 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:35,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:35,788 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. [2021-06-05 14:18:35,788 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:199 [2021-06-05 14:18:36,335 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]} [2021-06-05 14:18:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:36,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:36,514 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 103 [2021-06-05 14:18:36,515 INFO L628 ElimStorePlain]: treesize reduction 122, result has 69.3 percent of original size [2021-06-05 14:18:36,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-05 14:18:36,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-06-05 14:18:36,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:36,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:36,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:36,600 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 38 treesize of output 30 [2021-06-05 14:18:36,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:36,606 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 29 treesize of output 23 [2021-06-05 14:18:36,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:36,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:36,696 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 [2021-06-05 14:18:36,697 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:36,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:36,787 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:18:36,791 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 17 treesize of output 13 [2021-06-05 14:18:36,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:36,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:36,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:36,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:36,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:36,987 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 19 treesize of output 15 [2021-06-05 14:18:36,988 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:36,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:18:36,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_280 vanished before elimination [2021-06-05 14:18:37,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-05 14:18:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,087 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 24 treesize of output 9 [2021-06-05 14:18:37,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:18:37,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:18:37,108 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-06-05 14:18:37,114 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,211 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:18:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,217 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 [2021-06-05 14:18:37,218 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,222 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 [2021-06-05 14:18:37,222 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,319 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 9 treesize of output 3 [2021-06-05 14:18:37,320 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:18:37,409 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,413 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 [2021-06-05 14:18:37,414 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:37,510 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:37,514 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:37,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:37,594 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-06-05 14:18:37,594 INFO L518 ElimStorePlain]: Eliminatee v_prenex_269 vanished before elimination [2021-06-05 14:18:37,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 14:18:37,598 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 30 variables, input treesize:405, output treesize:126 [2021-06-05 14:18:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489060063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:18:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477912476] [2021-06-05 14:18:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:18:37,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:18:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:18:37,671 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) [2021-06-05 14:18:38,033 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 14:18:38,206 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-06-05 14:18:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:38,327 INFO L93 Difference]: Finished difference Result 234 states and 660 transitions. [2021-06-05 14:18:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:18:38,327 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 [2021-06-05 14:18:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:38,328 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:18:38,328 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:18:38,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:18:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:18:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2021-06-05 14:18:38,331 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) [2021-06-05 14:18:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 552 transitions. [2021-06-05 14:18:38,332 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 552 transitions. Word has length 17 [2021-06-05 14:18:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:38,332 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 552 transitions. [2021-06-05 14:18:38,332 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) [2021-06-05 14:18:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 552 transitions. [2021-06-05 14:18:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:38,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:38,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:38,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:38,537 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash 516905718, now seen corresponding path program 25 times [2021-06-05 14:18:38,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:38,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720868613] [2021-06-05 14:18:38,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:38,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720868613] [2021-06-05 14:18:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720868613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297564221] [2021-06-05 14:18:38,782 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 [2021-06-05 14:18:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:38,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:38,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,902 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 [2021-06-05 14:18:38,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,906 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 17 treesize of output 13 [2021-06-05 14:18:38,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,910 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 25 treesize of output 19 [2021-06-05 14:18:38,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:38,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:38,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:38,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:38,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:38,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-05 14:18:39,335 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]} [2021-06-05 14:18:39,341 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 [2021-06-05 14:18:39,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:18:39,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,571 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-06-05 14:18:39,571 INFO L628 ElimStorePlain]: treesize reduction 152, result has 58.7 percent of original size [2021-06-05 14:18:39,575 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 7 treesize of output 5 [2021-06-05 14:18:39,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,644 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 [2021-06-05 14:18:39,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,649 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 [2021-06-05 14:18:39,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:39,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:39,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,773 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 7 treesize of output 5 [2021-06-05 14:18:39,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:18:39,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:18:39,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-05 14:18:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,904 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 24 treesize of output 9 [2021-06-05 14:18:39,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:39,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,965 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 10 treesize of output 5 [2021-06-05 14:18:39,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:39,969 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 20 treesize of output 9 [2021-06-05 14:18:39,970 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:39,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:40,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:40,028 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-06-05 14:18:40,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:40,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:40,049 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 [2021-06-05 14:18:40,050 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:40,055 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 12 treesize of output 5 [2021-06-05 14:18:40,056 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:40,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:40,121 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 [2021-06-05 14:18:40,121 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:40,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:40,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:18:40,182 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-05 14:18:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:40,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297564221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:40,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:40,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145907241] [2021-06-05 14:18:40,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:40,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:40,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:40,227 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) [2021-06-05 14:18:40,599 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 14:18:40,811 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2021-06-05 14:18:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:40,942 INFO L93 Difference]: Finished difference Result 230 states and 649 transitions. [2021-06-05 14:18:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:40,942 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 [2021-06-05 14:18:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:40,943 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:18:40,943 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:18:40,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 928.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:18:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:18:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-06-05 14:18:40,945 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) [2021-06-05 14:18:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-05 14:18:40,946 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-05 14:18:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:40,946 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-05 14:18:40,946 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) [2021-06-05 14:18:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-05 14:18:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:40,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:40,946 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:41,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-05 14:18:41,147 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 968096220, now seen corresponding path program 26 times [2021-06-05 14:18:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:41,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299564273] [2021-06-05 14:18:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:41,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:41,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299564273] [2021-06-05 14:18:41,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299564273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:41,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690992157] [2021-06-05 14:18:41,421 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 [2021-06-05 14:18:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:41,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:41,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,558 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 15 treesize of output 11 [2021-06-05 14:18:41,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,562 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 [2021-06-05 14:18:41,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:41,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:41,566 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 35 treesize of output 27 [2021-06-05 14:18:41,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:41,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:41,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:41,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-06-05 14:18:42,030 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]} [2021-06-05 14:18:42,040 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 27 treesize of output 21 [2021-06-05 14:18:42,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:42,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,159 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-06-05 14:18:42,159 INFO L628 ElimStorePlain]: treesize reduction 121, result has 59.4 percent of original size [2021-06-05 14:18:42,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:42,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:42,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:42,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,263 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 [2021-06-05 14:18:42,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,268 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 27 treesize of output 21 [2021-06-05 14:18:42,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:42,315 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:42,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,366 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 12 treesize of output 5 [2021-06-05 14:18:42,367 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,413 INFO L518 ElimStorePlain]: Eliminatee v_prenex_318 vanished before elimination [2021-06-05 14:18:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,417 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 [2021-06-05 14:18:42,418 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,421 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 [2021-06-05 14:18:42,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,478 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 24 treesize of output 9 [2021-06-05 14:18:42,489 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,494 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 20 treesize of output 9 [2021-06-05 14:18:42,495 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,553 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 [2021-06-05 14:18:42,553 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:42,557 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 21 treesize of output 7 [2021-06-05 14:18:42,558 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:42,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:42,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:42,615 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-06-05 14:18:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:42,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690992157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:42,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:42,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:42,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263372121] [2021-06-05 14:18:42,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:42,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:42,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:42,666 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) [2021-06-05 14:18:42,993 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 14:18:43,260 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2021-06-05 14:18:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:43,330 INFO L93 Difference]: Finished difference Result 208 states and 601 transitions. [2021-06-05 14:18:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:18:43,331 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 [2021-06-05 14:18:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:43,331 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:18:43,331 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:18:43,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:18:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-06-05 14:18:43,334 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) [2021-06-05 14:18:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 554 transitions. [2021-06-05 14:18:43,335 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 554 transitions. Word has length 17 [2021-06-05 14:18:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:43,335 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 554 transitions. [2021-06-05 14:18:43,335 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) [2021-06-05 14:18:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 554 transitions. [2021-06-05 14:18:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:43,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:43,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:43,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:43,559 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:43,560 INFO L82 PathProgramCache]: Analyzing trace with hash -557813204, now seen corresponding path program 27 times [2021-06-05 14:18:43,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:43,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595555498] [2021-06-05 14:18:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:43,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595555498] [2021-06-05 14:18:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595555498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698514892] [2021-06-05 14:18:43,896 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 [2021-06-05 14:18:43,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:18:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:18:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:44,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,066 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 [2021-06-05 14:18:44,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:44,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,107 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 27 treesize of output 21 [2021-06-05 14:18:44,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:44,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,111 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 25 treesize of output 19 [2021-06-05 14:18:44,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,150 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. [2021-06-05 14:18:44,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:134, output treesize:122 [2021-06-05 14:18:44,341 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]} [2021-06-05 14:18:44,345 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 25 treesize of output 19 [2021-06-05 14:18:44,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,437 INFO L628 ElimStorePlain]: treesize reduction 150, result has 46.8 percent of original size [2021-06-05 14:18:44,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:44,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:44,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:44,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:44,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:18:44,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,531 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 27 treesize of output 21 [2021-06-05 14:18:44,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,574 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 11 treesize of output 3 [2021-06-05 14:18:44,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,578 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 [2021-06-05 14:18:44,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,621 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:18:44,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,625 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 11 treesize of output 3 [2021-06-05 14:18:44,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:44,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:18:44,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:44,677 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 10 treesize of output 5 [2021-06-05 14:18:44,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:44,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:44,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:18:44,714 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:289, output treesize:52 [2021-06-05 14:18:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:44,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698514892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:44,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:44,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 14:18:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737899249] [2021-06-05 14:18:44,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:18:44,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:18:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:44,765 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) [2021-06-05 14:18:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:45,177 INFO L93 Difference]: Finished difference Result 219 states and 634 transitions. [2021-06-05 14:18:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:18:45,177 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 [2021-06-05 14:18:45,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:45,178 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:18:45,178 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:18:45,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:18:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:18:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2021-06-05 14:18:45,180 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) [2021-06-05 14:18:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-06-05 14:18:45,181 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-06-05 14:18:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:45,181 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-06-05 14:18:45,181 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) [2021-06-05 14:18:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-06-05 14:18:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:45,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:45,182 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:45,385 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash 153290066, now seen corresponding path program 28 times [2021-06-05 14:18:45,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:45,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748718853] [2021-06-05 14:18:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:45,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:45,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748718853] [2021-06-05 14:18:45,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748718853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:45,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495820584] [2021-06-05 14:18:45,662 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 [2021-06-05 14:18:45,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:18:45,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:18:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:45,785 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 27 treesize of output 21 [2021-06-05 14:18:45,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:45,789 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 25 treesize of output 19 [2021-06-05 14:18:45,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:45,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:45,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:45,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:45,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:45,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:45,890 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-06-05 14:18:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:45,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:45,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:45,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:45,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:45,995 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 [2021-06-05 14:18:45,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:45,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,000 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 28 treesize of output 22 [2021-06-05 14:18:46,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,004 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 35 treesize of output 27 [2021-06-05 14:18:46,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,011 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 19 treesize of output 15 [2021-06-05 14:18:46,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,015 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 29 treesize of output 23 [2021-06-05 14:18:46,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:46,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,021 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 35 treesize of output 27 [2021-06-05 14:18:46,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:46,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:46,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:46,033 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,038 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 38 treesize of output 30 [2021-06-05 14:18:46,039 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:46,223 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-06-05 14:18:46,223 INFO L628 ElimStorePlain]: treesize reduction 378, result has 39.1 percent of original size [2021-06-05 14:18:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,227 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 [2021-06-05 14:18:46,228 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,231 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 12 treesize of output 5 [2021-06-05 14:18:46,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,235 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 [2021-06-05 14:18:46,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,239 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 20 treesize of output 9 [2021-06-05 14:18:46,240 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,243 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 [2021-06-05 14:18:46,244 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:46,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:46,256 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:46,259 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:46,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:46,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:46,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:18:46,336 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-06-05 14:18:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495820584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:46,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:46,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:46,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215031397] [2021-06-05 14:18:46,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:46,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:46,529 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) [2021-06-05 14:18:46,866 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 14:18:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:46,956 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2021-06-05 14:18:46,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:18:46,957 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 [2021-06-05 14:18:46,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:46,958 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:18:46,958 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 14:18:46,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:18:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 14:18:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 184. [2021-06-05 14:18:46,961 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) [2021-06-05 14:18:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-05 14:18:46,961 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-05 14:18:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:46,961 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-05 14:18:46,962 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) [2021-06-05 14:18:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-05 14:18:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:46,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:46,962 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:47,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:47,173 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1175189202, now seen corresponding path program 29 times [2021-06-05 14:18:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:47,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912271594] [2021-06-05 14:18:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912271594] [2021-06-05 14:18:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912271594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8184645] [2021-06-05 14:18:47,414 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 [2021-06-05 14:18:47,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:18:47,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:18:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:47,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,573 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 25 treesize of output 19 [2021-06-05 14:18:47,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,579 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 35 treesize of output 27 [2021-06-05 14:18:47,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:18:47,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:47,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:47,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:47,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:47,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:293 [2021-06-05 14:18:48,302 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 96 [2021-06-05 14:18:49,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:49,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:49,289 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 30 treesize of output 24 [2021-06-05 14:18:49,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:49,299 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 28 treesize of output 22 [2021-06-05 14:18:49,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:49,871 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 161 [2021-06-05 14:18:49,871 INFO L628 ElimStorePlain]: treesize reduction 534, result has 50.6 percent of original size [2021-06-05 14:18:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:49,879 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 27 treesize of output 21 [2021-06-05 14:18:49,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:50,101 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-05 14:18:50,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:50,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:18:50,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:50,328 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 14:18:50,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:50,337 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 12 treesize of output 5 [2021-06-05 14:18:50,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:50,553 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 14:18:50,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:50,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:50,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:50,562 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 19 treesize of output 15 [2021-06-05 14:18:50,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:50,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:18:50,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:50,979 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 145 [2021-06-05 14:18:50,980 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.9 percent of original size [2021-06-05 14:18:50,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_351 vanished before elimination [2021-06-05 14:18:50,988 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 7 treesize of output 5 [2021-06-05 14:18:50,989 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,192 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 14:18:51,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:51,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,200 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 11 treesize of output 3 [2021-06-05 14:18:51,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,208 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 12 treesize of output 5 [2021-06-05 14:18:51,209 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,410 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 14:18:51,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:51,410 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-06-05 14:18:51,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,417 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 27 treesize of output 21 [2021-06-05 14:18:51,418 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:51,621 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 14:18:51,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:51,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,629 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 11 treesize of output 3 [2021-06-05 14:18:51,630 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,636 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 21 treesize of output 7 [2021-06-05 14:18:51,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:51,848 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 14:18:51,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:51,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,855 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 30 treesize of output 24 [2021-06-05 14:18:51,856 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:51,862 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 28 treesize of output 22 [2021-06-05 14:18:51,863 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:52,229 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-06-05 14:18:52,230 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.9 percent of original size [2021-06-05 14:18:52,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,236 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 [2021-06-05 14:18:52,237 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:52,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,243 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 12 treesize of output 5 [2021-06-05 14:18:52,243 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:52,422 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 14:18:52,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:52,442 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:52,626 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 14:18:52,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:52,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,636 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 20 treesize of output 9 [2021-06-05 14:18:52,636 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:18:52,643 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:52,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:52,829 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 14:18:52,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:52,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:52,835 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 48 treesize of output 38 [2021-06-05 14:18:52,836 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:53,016 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 14:18:53,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:53,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:53,021 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 44 treesize of output 19 [2021-06-05 14:18:53,022 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:53,184 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 14:18:53,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:53,191 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 [2021-06-05 14:18:53,191 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:53,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:18:53,197 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:53,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:53,353 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 14:18:53,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:53,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 18 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 14:18:53,360 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 28 variables, input treesize:1101, output treesize:264 [2021-06-05 14:18:53,538 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 14:18:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8184645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:53,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:18:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055230951] [2021-06-05 14:18:53,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:53,642 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) [2021-06-05 14:18:54,081 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:18:54,670 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-06-05 14:18:55,035 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 14:18:55,229 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:18:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:55,336 INFO L93 Difference]: Finished difference Result 234 states and 668 transitions. [2021-06-05 14:18:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:18:55,336 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 [2021-06-05 14:18:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:55,337 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:18:55,337 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:18:55,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2414.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:18:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:18:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2021-06-05 14:18:55,341 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) [2021-06-05 14:18:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-06-05 14:18:55,341 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-06-05 14:18:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:55,341 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-06-05 14:18:55,342 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) [2021-06-05 14:18:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-06-05 14:18:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:55,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:55,342 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:55,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:55,557 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:55,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1517772714, now seen corresponding path program 30 times [2021-06-05 14:18:55,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:55,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281989647] [2021-06-05 14:18:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:55,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:55,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281989647] [2021-06-05 14:18:55,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281989647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:55,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675690085] [2021-06-05 14:18:55,701 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 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 [2021-06-05 14:18:55,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:18:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:18:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:55,795 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 25 treesize of output 19 [2021-06-05 14:18:55,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,798 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 17 treesize of output 13 [2021-06-05 14:18:55,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,801 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 [2021-06-05 14:18:55,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:55,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:18:55,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:55,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:18:55,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:125 [2021-06-05 14:18:55,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:18:55,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,922 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 15 treesize of output 11 [2021-06-05 14:18:55,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:18:55,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:55,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 14:18:55,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:55,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:18:55,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,940 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 25 treesize of output 19 [2021-06-05 14:18:55,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,944 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 [2021-06-05 14:18:55,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,949 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 35 treesize of output 27 [2021-06-05 14:18:55,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:55,954 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 27 treesize of output 21 [2021-06-05 14:18:55,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:55,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:18:55,959 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,102 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 14:18:56,103 INFO L628 ElimStorePlain]: treesize reduction 245, result has 46.6 percent of original size [2021-06-05 14:18:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,107 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 24 treesize of output 9 [2021-06-05 14:18:56,107 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,111 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 [2021-06-05 14:18:56,111 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:56,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:18:56,122 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,126 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 11 treesize of output 3 [2021-06-05 14:18:56,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,130 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 21 treesize of output 7 [2021-06-05 14:18:56,130 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:56,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,141 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 [2021-06-05 14:18:56,141 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:56,144 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 20 treesize of output 9 [2021-06-05 14:18:56,153 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:56,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:56,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:56,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:18:56,217 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:427, output treesize:140 [2021-06-05 14:18:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:56,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675690085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:56,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:56,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:18:56,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336336031] [2021-06-05 14:18:56,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:18:56,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:18:56,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:18:56,350 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) [2021-06-05 14:18:56,768 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:18:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:56,822 INFO L93 Difference]: Finished difference Result 212 states and 621 transitions. [2021-06-05 14:18:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:18:56,823 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 [2021-06-05 14:18:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:56,823 INFO L225 Difference]: With dead ends: 212 [2021-06-05 14:18:56,823 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:18:56,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:18:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:18:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-06-05 14:18:56,826 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) [2021-06-05 14:18:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-06-05 14:18:56,826 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-06-05 14:18:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:56,826 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-06-05 14:18:56,826 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) [2021-06-05 14:18:56,826 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-06-05 14:18:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:56,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:56,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:57,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-05 14:18:57,027 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:18:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1096748704, now seen corresponding path program 31 times [2021-06-05 14:18:57,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:57,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410295519] [2021-06-05 14:18:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:57,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410295519] [2021-06-05 14:18:57,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410295519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:57,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943981904] [2021-06-05 14:18:57,287 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 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 [2021-06-05 14:18:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:18:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,488 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 17 treesize of output 13 [2021-06-05 14:18:57,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,492 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 [2021-06-05 14:18:57,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:18:57,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:57,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,542 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 25 treesize of output 19 [2021-06-05 14:18:57,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:57,589 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. [2021-06-05 14:18:57,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-05 14:18:57,815 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:18:57,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,820 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 27 treesize of output 21 [2021-06-05 14:18:57,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,825 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 15 treesize of output 11 [2021-06-05 14:18:57,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,830 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 37 treesize of output 29 [2021-06-05 14:18:57,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:18:57,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,840 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 [2021-06-05 14:18:57,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:57,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,846 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 35 treesize of output 27 [2021-06-05 14:18:57,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:18:57,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,852 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 18 treesize of output 14 [2021-06-05 14:18:57,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,858 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 [2021-06-05 14:18:57,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:57,864 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 17 treesize of output 13 [2021-06-05 14:18:57,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:57,869 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 28 treesize of output 22 [2021-06-05 14:18:57,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:18:58,112 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-05 14:18:58,113 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-06-05 14:18:58,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,118 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 [2021-06-05 14:18:58,118 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-05 14:18:58,123 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,136 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 44 treesize of output 19 [2021-06-05 14:18:58,137 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,141 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 24 treesize of output 9 [2021-06-05 14:18:58,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:58,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,158 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 21 treesize of output 7 [2021-06-05 14:18:58,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,162 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 21 treesize of output 7 [2021-06-05 14:18:58,163 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:58,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,175 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 [2021-06-05 14:18:58,175 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,180 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 9 treesize of output 3 [2021-06-05 14:18:58,181 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,185 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 20 treesize of output 9 [2021-06-05 14:18:58,185 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,190 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 [2021-06-05 14:18:58,190 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:18:58,194 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 [2021-06-05 14:18:58,194 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:18:58,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:58,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:18:58,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:18:58,302 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-05 14:18:58,452 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:18:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:18:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943981904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:58,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:58,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:18:58,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257225290] [2021-06-05 14:18:58,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:18:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:18:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:58,509 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) [2021-06-05 14:18:59,338 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 98 [2021-06-05 14:18:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:59,796 INFO L93 Difference]: Finished difference Result 252 states and 736 transitions. [2021-06-05 14:18:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:18:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:18:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:59,798 INFO L225 Difference]: With dead ends: 252 [2021-06-05 14:18:59,798 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 14:18:59,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1463.2ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:18:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 14:18:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2021-06-05 14:18:59,800 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) [2021-06-05 14:18:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 579 transitions. [2021-06-05 14:18:59,801 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 579 transitions. Word has length 17 [2021-06-05 14:18:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:59,801 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 579 transitions. [2021-06-05 14:18:59,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 579 transitions. [2021-06-05 14:18:59,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:18:59,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:59,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:00,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-05 14:19:00,002 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1716980722, now seen corresponding path program 32 times [2021-06-05 14:19:00,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:00,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683820295] [2021-06-05 14:19:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:00,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:00,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683820295] [2021-06-05 14:19:00,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683820295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:00,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69719446] [2021-06-05 14:19:00,169 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 [2021-06-05 14:19:00,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,384 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 25 treesize of output 19 [2021-06-05 14:19:00,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,389 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 [2021-06-05 14:19:00,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,393 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 [2021-06-05 14:19:00,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,398 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 [2021-06-05 14:19:00,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:00,478 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. [2021-06-05 14:19:00,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:183, output treesize:243 [2021-06-05 14:19:00,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,652 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 27 treesize of output 21 [2021-06-05 14:19:00,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:00,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,658 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 [2021-06-05 14:19:00,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,935 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-06-05 14:19:00,935 INFO L628 ElimStorePlain]: treesize reduction 233, result has 63.1 percent of original size [2021-06-05 14:19:00,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:00,940 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 10 treesize of output 5 [2021-06-05 14:19:00,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,945 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 20 treesize of output 9 [2021-06-05 14:19:00,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:00,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,062 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 14:19:01,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,067 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 [2021-06-05 14:19:01,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:01,180 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 14:19:01,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,184 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 21 treesize of output 7 [2021-06-05 14:19:01,185 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,189 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 [2021-06-05 14:19:01,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,310 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 14:19:01,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,316 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 48 treesize of output 38 [2021-06-05 14:19:01,317 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,322 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 [2021-06-05 14:19:01,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,327 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 28 treesize of output 22 [2021-06-05 14:19:01,328 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:19:01,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,337 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 30 treesize of output 24 [2021-06-05 14:19:01,338 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,342 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 30 treesize of output 24 [2021-06-05 14:19:01,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,516 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 14:19:01,517 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.9 percent of original size [2021-06-05 14:19:01,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,521 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 44 treesize of output 19 [2021-06-05 14:19:01,522 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,526 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 [2021-06-05 14:19:01,527 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,531 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 12 treesize of output 5 [2021-06-05 14:19:01,531 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:01,535 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 21 treesize of output 7 [2021-06-05 14:19:01,536 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,539 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 12 treesize of output 5 [2021-06-05 14:19:01,540 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,623 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 7 treesize of output 5 [2021-06-05 14:19:01,624 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:01,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:01,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-05 14:19:01,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:01,705 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-06-05 14:19:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:01,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69719446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:01,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:01,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:19:01,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186957528] [2021-06-05 14:19:01,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:01,888 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) [2021-06-05 14:19:02,471 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 14:19:02,764 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-06-05 14:19:02,965 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 14:19:03,358 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 14:19:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:03,424 INFO L93 Difference]: Finished difference Result 272 states and 764 transitions. [2021-06-05 14:19:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:19:03,424 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 [2021-06-05 14:19:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:03,425 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:19:03,425 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 14:19:03,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1514.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:19:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 14:19:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2021-06-05 14:19:03,429 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) [2021-06-05 14:19:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-05 14:19:03,429 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-05 14:19:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:03,429 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-05 14:19:03,429 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) [2021-06-05 14:19:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-05 14:19:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:03,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:03,430 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:03,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 14:19:03,630 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2006531768, now seen corresponding path program 33 times [2021-06-05 14:19:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:03,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79177417] [2021-06-05 14:19:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:03,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:03,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79177417] [2021-06-05 14:19:03,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79177417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:03,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173150799] [2021-06-05 14:19:03,816 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 [2021-06-05 14:19:03,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:19:03,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:19:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:19:04,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:04,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,069 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 [2021-06-05 14:19:04,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,073 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 15 treesize of output 11 [2021-06-05 14:19:04,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,127 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. [2021-06-05 14:19:04,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:158, output treesize:148 [2021-06-05 14:19:04,352 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 55=[array_2]} [2021-06-05 14:19:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:04,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:04,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,369 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 35 treesize of output 27 [2021-06-05 14:19:04,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,376 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 28 treesize of output 22 [2021-06-05 14:19:04,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,382 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 35 treesize of output 27 [2021-06-05 14:19:04,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:04,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:04,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,396 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 19 treesize of output 15 [2021-06-05 14:19:04,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,403 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 [2021-06-05 14:19:04,403 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,409 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 38 treesize of output 30 [2021-06-05 14:19:04,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:04,416 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 29 treesize of output 23 [2021-06-05 14:19:04,417 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:04,681 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2021-06-05 14:19:04,682 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-06-05 14:19:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,688 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 20 treesize of output 9 [2021-06-05 14:19:04,688 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,693 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 20 treesize of output 9 [2021-06-05 14:19:04,694 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,707 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 21 treesize of output 7 [2021-06-05 14:19:04,708 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,713 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 21 treesize of output 7 [2021-06-05 14:19:04,714 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,727 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 11 treesize of output 3 [2021-06-05 14:19:04,727 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,732 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 [2021-06-05 14:19:04,732 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,737 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 46 treesize of output 15 [2021-06-05 14:19:04,738 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,743 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 24 treesize of output 9 [2021-06-05 14:19:04,743 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,760 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 24 treesize of output 9 [2021-06-05 14:19:04,761 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:04,765 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 12 treesize of output 5 [2021-06-05 14:19:04,765 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:04,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,878 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 14:19:04,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:04,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:19:04,889 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:509, output treesize:199 [2021-06-05 14:19:05,047 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-06-05 14:19:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:05,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173150799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:05,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:05,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:19:05,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576721301] [2021-06-05 14:19:05,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:05,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:05,135 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) [2021-06-05 14:19:05,809 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 14:19:06,030 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2021-06-05 14:19:06,285 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-06-05 14:19:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:06,382 INFO L93 Difference]: Finished difference Result 340 states and 970 transitions. [2021-06-05 14:19:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:19:06,382 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 [2021-06-05 14:19:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:06,384 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:19:06,384 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:19:06,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1408.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:19:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:19:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 197. [2021-06-05 14:19:06,388 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) [2021-06-05 14:19:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 586 transitions. [2021-06-05 14:19:06,388 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 586 transitions. Word has length 17 [2021-06-05 14:19:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:06,388 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 586 transitions. [2021-06-05 14:19:06,389 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) [2021-06-05 14:19:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 586 transitions. [2021-06-05 14:19:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:06,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:06,389 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:06,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-05 14:19:06,605 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash -150320166, now seen corresponding path program 34 times [2021-06-05 14:19:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:06,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776271052] [2021-06-05 14:19:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:06,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:06,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776271052] [2021-06-05 14:19:06,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776271052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:06,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928917569] [2021-06-05 14:19:06,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:19:06,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:19:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:06,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,091 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 [2021-06-05 14:19:07,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:07,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,097 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 [2021-06-05 14:19:07,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,101 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 17 treesize of output 13 [2021-06-05 14:19:07,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,106 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 17 treesize of output 13 [2021-06-05 14:19:07,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,111 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 [2021-06-05 14:19:07,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,115 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 [2021-06-05 14:19:07,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:07,207 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. [2021-06-05 14:19:07,208 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:249, output treesize:225 [2021-06-05 14:19:07,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,663 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 15 treesize of output 11 [2021-06-05 14:19:07,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,671 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 25 treesize of output 19 [2021-06-05 14:19:07,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:07,935 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-06-05 14:19:07,935 INFO L628 ElimStorePlain]: treesize reduction 170, result has 62.8 percent of original size [2021-06-05 14:19:07,935 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-06-05 14:19:07,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:07,940 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 19 treesize of output 15 [2021-06-05 14:19:07,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,030 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 19 treesize of output 15 [2021-06-05 14:19:08,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,037 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 28 treesize of output 22 [2021-06-05 14:19:08,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,043 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 21 treesize of output 17 [2021-06-05 14:19:08,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,049 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 30 treesize of output 24 [2021-06-05 14:19:08,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,126 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 11 treesize of output 3 [2021-06-05 14:19:08,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,202 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 11 treesize of output 3 [2021-06-05 14:19:08,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:08,208 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,213 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 12 treesize of output 5 [2021-06-05 14:19:08,213 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,218 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 24 treesize of output 9 [2021-06-05 14:19:08,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:19:08,291 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:08,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,367 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 [2021-06-05 14:19:08,368 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:08,372 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 10 treesize of output 5 [2021-06-05 14:19:08,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:08,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:08,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:08,520 INFO L518 ElimStorePlain]: Eliminatee v_prenex_413 vanished before elimination [2021-06-05 14:19:08,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:19:08,523 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:471, output treesize:62 [2021-06-05 14:19:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:08,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928917569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:08,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:08,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:19:08,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567879594] [2021-06-05 14:19:08,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:08,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:08,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:08,567 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) [2021-06-05 14:19:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:09,080 INFO L93 Difference]: Finished difference Result 239 states and 690 transitions. [2021-06-05 14:19:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:09,080 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 [2021-06-05 14:19:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:09,082 INFO L225 Difference]: With dead ends: 239 [2021-06-05 14:19:09,082 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 14:19:09,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 14:19:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2021-06-05 14:19:09,085 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) [2021-06-05 14:19:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 581 transitions. [2021-06-05 14:19:09,085 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 581 transitions. Word has length 17 [2021-06-05 14:19:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:09,086 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 581 transitions. [2021-06-05 14:19:09,086 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) [2021-06-05 14:19:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 581 transitions. [2021-06-05 14:19:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:09,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:09,086 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:09,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-05 14:19:09,301 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1618381758, now seen corresponding path program 35 times [2021-06-05 14:19:09,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:09,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421054054] [2021-06-05 14:19:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:09,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421054054] [2021-06-05 14:19:09,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421054054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963986757] [2021-06-05 14:19:09,539 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 [2021-06-05 14:19:09,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:09,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,711 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 [2021-06-05 14:19:09,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,716 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 [2021-06-05 14:19:09,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,721 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 [2021-06-05 14:19:09,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:09,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:09,725 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 17 treesize of output 13 [2021-06-05 14:19:09,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:09,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:09,786 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. [2021-06-05 14:19:09,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:195, output treesize:185 [2021-06-05 14:19:10,117 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 14:19:10,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:10,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:10,924 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 [2021-06-05 14:19:10,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:10,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:10,933 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 27 treesize of output 21 [2021-06-05 14:19:10,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:11,204 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2021-06-05 14:19:11,205 INFO L628 ElimStorePlain]: treesize reduction 169, result has 63.9 percent of original size [2021-06-05 14:19:11,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:11,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,310 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 19 treesize of output 15 [2021-06-05 14:19:11,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,402 INFO L518 ElimStorePlain]: Eliminatee v_prenex_439 vanished before elimination [2021-06-05 14:19:11,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,407 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 11 treesize of output 3 [2021-06-05 14:19:11,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,506 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 [2021-06-05 14:19:11,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,512 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 30 treesize of output 24 [2021-06-05 14:19:11,513 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:11,605 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,610 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 24 treesize of output 9 [2021-06-05 14:19:11,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,699 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 21 treesize of output 17 [2021-06-05 14:19:11,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,704 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 19 treesize of output 15 [2021-06-05 14:19:11,705 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,787 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 11 treesize of output 3 [2021-06-05 14:19:11,788 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,792 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 12 treesize of output 5 [2021-06-05 14:19:11,793 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:11,873 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:11,947 INFO L518 ElimStorePlain]: Eliminatee v_prenex_435 vanished before elimination [2021-06-05 14:19:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,952 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 10 treesize of output 5 [2021-06-05 14:19:11,953 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:11,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:19:11,958 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:11,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:12,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:12,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:19:12,041 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:466, output treesize:66 [2021-06-05 14:19:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:12,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963986757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:12,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:12,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:19:12,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582947727] [2021-06-05 14:19:12,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:12,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:12,091 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) [2021-06-05 14:19:12,534 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 14:19:12,837 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 123 [2021-06-05 14:19:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:12,948 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2021-06-05 14:19:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:12,948 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 [2021-06-05 14:19:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:12,949 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:19:12,949 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 14:19:12,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1165.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 14:19:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 194. [2021-06-05 14:19:12,952 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) [2021-06-05 14:19:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 577 transitions. [2021-06-05 14:19:12,952 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 577 transitions. Word has length 17 [2021-06-05 14:19:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:12,953 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 577 transitions. [2021-06-05 14:19:12,953 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) [2021-06-05 14:19:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 577 transitions. [2021-06-05 14:19:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:12,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:12,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:13,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:13,157 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 952378238, now seen corresponding path program 36 times [2021-06-05 14:19:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260725780] [2021-06-05 14:19:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:13,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:13,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260725780] [2021-06-05 14:19:13,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260725780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:13,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317135016] [2021-06-05 14:19:13,451 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 [2021-06-05 14:19:13,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:19:13,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:13,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,619 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 17 treesize of output 13 [2021-06-05 14:19:13,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:13,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,623 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 [2021-06-05 14:19:13,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:13,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:19:13,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:13,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:13,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:13,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:13,709 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. [2021-06-05 14:19:13,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:223, output treesize:213 [2021-06-05 14:19:13,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,944 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 [2021-06-05 14:19:13,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:13,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:13,949 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 35 treesize of output 27 [2021-06-05 14:19:13,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:14,241 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-05 14:19:14,241 INFO L628 ElimStorePlain]: treesize reduction 200, result has 67.0 percent of original size [2021-06-05 14:19:14,246 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 7 treesize of output 5 [2021-06-05 14:19:14,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,373 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 14:19:14,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:14,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,379 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 19 treesize of output 15 [2021-06-05 14:19:14,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,385 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 28 treesize of output 22 [2021-06-05 14:19:14,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:19:14,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,396 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 30 treesize of output 24 [2021-06-05 14:19:14,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,519 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 14:19:14,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,524 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 [2021-06-05 14:19:14,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,530 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 21 treesize of output 7 [2021-06-05 14:19:14,530 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,535 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 11 treesize of output 3 [2021-06-05 14:19:14,536 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,540 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 24 treesize of output 9 [2021-06-05 14:19:14,541 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,655 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 14:19:14,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:14,655 INFO L518 ElimStorePlain]: Eliminatee v_prenex_450 vanished before elimination [2021-06-05 14:19:14,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,660 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 17 treesize of output 13 [2021-06-05 14:19:14,661 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,665 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 19 treesize of output 15 [2021-06-05 14:19:14,666 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,773 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 14:19:14,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,778 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 9 treesize of output 3 [2021-06-05 14:19:14,779 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,783 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 11 treesize of output 3 [2021-06-05 14:19:14,784 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,889 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 14:19:14,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:14,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,894 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 20 treesize of output 9 [2021-06-05 14:19:14,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:14,898 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 20 treesize of output 9 [2021-06-05 14:19:14,899 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:14,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:15,006 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 14:19:15,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:15,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:15,010 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 12 variables, input treesize:536, output treesize:204 [2021-06-05 14:19:15,156 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 14:19:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:15,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317135016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:15,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:15,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:19:15,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762997922] [2021-06-05 14:19:15,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:15,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:15,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:15,238 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) [2021-06-05 14:19:15,634 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 14:19:15,834 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 14:19:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:15,903 INFO L93 Difference]: Finished difference Result 249 states and 719 transitions. [2021-06-05 14:19:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:15,903 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 [2021-06-05 14:19:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:15,904 INFO L225 Difference]: With dead ends: 249 [2021-06-05 14:19:15,904 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 14:19:15,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 996.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 14:19:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2021-06-05 14:19:15,906 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) [2021-06-05 14:19:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 561 transitions. [2021-06-05 14:19:15,907 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 561 transitions. Word has length 17 [2021-06-05 14:19:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:15,907 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 561 transitions. [2021-06-05 14:19:15,907 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) [2021-06-05 14:19:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 561 transitions. [2021-06-05 14:19:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:15,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:15,907 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:16,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:16,108 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1965452058, now seen corresponding path program 37 times [2021-06-05 14:19:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:16,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681186312] [2021-06-05 14:19:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:16,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681186312] [2021-06-05 14:19:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681186312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600076924] [2021-06-05 14:19:16,344 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 [2021-06-05 14:19:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:16,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:16,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:19:16,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,591 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 27 treesize of output 21 [2021-06-05 14:19:16,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,597 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 25 treesize of output 19 [2021-06-05 14:19:16,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:16,644 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. [2021-06-05 14:19:16,644 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-05 14:19:16,868 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 36=[array_0]} [2021-06-05 14:19:16,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,874 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 27 treesize of output 21 [2021-06-05 14:19:16,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,880 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 [2021-06-05 14:19:16,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,885 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 35 treesize of output 27 [2021-06-05 14:19:16,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:16,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:19:16,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,897 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 18 treesize of output 14 [2021-06-05 14:19:16,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,903 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 37 treesize of output 29 [2021-06-05 14:19:16,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:16,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,910 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 [2021-06-05 14:19:16,910 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:16,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,915 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 [2021-06-05 14:19:16,916 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:16,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:16,921 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 28 treesize of output 22 [2021-06-05 14:19:16,922 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:16,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:16,928 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,159 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2021-06-05 14:19:17,159 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-05 14:19:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,164 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 23 treesize of output 11 [2021-06-05 14:19:17,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,170 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 12 treesize of output 5 [2021-06-05 14:19:17,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,184 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 11 treesize of output 3 [2021-06-05 14:19:17,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,189 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 21 treesize of output 7 [2021-06-05 14:19:17,189 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:17,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,202 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 21 treesize of output 7 [2021-06-05 14:19:17,202 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,207 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 11 treesize of output 3 [2021-06-05 14:19:17,207 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:19:17,220 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,225 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 10 treesize of output 5 [2021-06-05 14:19:17,226 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,230 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 24 treesize of output 9 [2021-06-05 14:19:17,231 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:19:17,236 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:17,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:17,252 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 9 treesize of output 3 [2021-06-05 14:19:17,252 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:17,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:17,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:17,356 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:419, output treesize:179 [2021-06-05 14:19:17,503 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:19:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:17,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600076924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:17,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:17,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:19:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956958117] [2021-06-05 14:19:17,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:19:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:17,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:19:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:19:17,566 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) [2021-06-05 14:19:18,183 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 14:19:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:18,233 INFO L93 Difference]: Finished difference Result 220 states and 644 transitions. [2021-06-05 14:19:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:19:18,234 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 [2021-06-05 14:19:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:18,234 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:19:18,234 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:19:18,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 940.1ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:19:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:19:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 194. [2021-06-05 14:19:18,236 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) [2021-06-05 14:19:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 573 transitions. [2021-06-05 14:19:18,237 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 573 transitions. Word has length 17 [2021-06-05 14:19:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:18,237 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 573 transitions. [2021-06-05 14:19:18,237 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) [2021-06-05 14:19:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 573 transitions. [2021-06-05 14:19:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:18,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:18,237 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:18,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:18,438 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash -848277368, now seen corresponding path program 38 times [2021-06-05 14:19:18,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:18,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950961998] [2021-06-05 14:19:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:18,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:18,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950961998] [2021-06-05 14:19:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950961998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:18,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614007625] [2021-06-05 14:19:18,684 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 [2021-06-05 14:19:18,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:18,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:18,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:18,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,897 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 35 treesize of output 27 [2021-06-05 14:19:18,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:18,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:18,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:18,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:18,906 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 [2021-06-05 14:19:18,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:18,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:18,985 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. [2021-06-05 14:19:18,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:231 [2021-06-05 14:19:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,156 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 [2021-06-05 14:19:19,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,161 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 [2021-06-05 14:19:19,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:19,423 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 14:19:19,424 INFO L628 ElimStorePlain]: treesize reduction 221, result has 63.7 percent of original size [2021-06-05 14:19:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:19,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,539 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 14:19:19,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:19,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:19:19,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,549 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 [2021-06-05 14:19:19,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:19,677 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 14:19:19,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:19,678 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:19:19,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,683 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 48 treesize of output 38 [2021-06-05 14:19:19,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,688 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 28 treesize of output 22 [2021-06-05 14:19:19,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,694 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 30 treesize of output 24 [2021-06-05 14:19:19,695 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,700 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 30 treesize of output 24 [2021-06-05 14:19:19,700 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,705 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 28 treesize of output 22 [2021-06-05 14:19:19,706 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:19:19,710 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,879 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 14:19:19,879 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.6 percent of original size [2021-06-05 14:19:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,883 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 44 treesize of output 19 [2021-06-05 14:19:19,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,888 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 21 treesize of output 7 [2021-06-05 14:19:19,889 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,892 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 21 treesize of output 7 [2021-06-05 14:19:19,893 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,897 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 [2021-06-05 14:19:19,897 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,900 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 12 treesize of output 5 [2021-06-05 14:19:19,901 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:19,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:19,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:19,982 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 27 treesize of output 21 [2021-06-05 14:19:19,983 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:20,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:20,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:20,069 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 20 treesize of output 9 [2021-06-05 14:19:20,069 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:20,072 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 10 treesize of output 5 [2021-06-05 14:19:20,073 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:20,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:20,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:20,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:20,163 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-05 14:19:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614007625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:19:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741872771] [2021-06-05 14:19:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:19:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:19:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:19:20,311 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) [2021-06-05 14:19:20,700 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 14:19:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:20,854 INFO L93 Difference]: Finished difference Result 229 states and 658 transitions. [2021-06-05 14:19:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:20,854 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 [2021-06-05 14:19:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:20,855 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:19:20,855 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:19:20,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:19:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:19:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2021-06-05 14:19:20,857 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) [2021-06-05 14:19:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 585 transitions. [2021-06-05 14:19:20,857 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 585 transitions. Word has length 17 [2021-06-05 14:19:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:20,858 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 585 transitions. [2021-06-05 14:19:20,858 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) [2021-06-05 14:19:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 585 transitions. [2021-06-05 14:19:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:20,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:20,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:21,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:21,059 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:21,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1775713912, now seen corresponding path program 39 times [2021-06-05 14:19:21,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:21,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852621808] [2021-06-05 14:19:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:21,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:21,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852621808] [2021-06-05 14:19:21,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852621808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:21,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934091976] [2021-06-05 14:19:21,311 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 [2021-06-05 14:19:21,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:19:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:21,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,542 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 [2021-06-05 14:19:21,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:21,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:21,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:21,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,611 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 [2021-06-05 14:19:21,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,615 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 17 treesize of output 13 [2021-06-05 14:19:21,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:21,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,676 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 [2021-06-05 14:19:21,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:21,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:21,682 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 27 treesize of output 21 [2021-06-05 14:19:21,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:21,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:21,750 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. [2021-06-05 14:19:21,751 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-05 14:19:22,027 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]} [2021-06-05 14:19:22,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:22,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,039 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 27 treesize of output 21 [2021-06-05 14:19:22,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:22,205 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2021-06-05 14:19:22,206 INFO L628 ElimStorePlain]: treesize reduction 137, result has 63.5 percent of original size [2021-06-05 14:19:22,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:22,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,278 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 19 treesize of output 15 [2021-06-05 14:19:22,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:22,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:19:22,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:19:22,415 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,419 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 19 treesize of output 15 [2021-06-05 14:19:22,420 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:19:22,424 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,479 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 20 treesize of output 9 [2021-06-05 14:19:22,480 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:19:22,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,542 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:19:22,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:19:22,546 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,595 INFO L518 ElimStorePlain]: Eliminatee v_prenex_485 vanished before elimination [2021-06-05 14:19:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,599 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 12 treesize of output 5 [2021-06-05 14:19:22,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,604 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 11 treesize of output 3 [2021-06-05 14:19:22,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,608 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 21 treesize of output 7 [2021-06-05 14:19:22,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:22,611 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 24 treesize of output 9 [2021-06-05 14:19:22,612 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:22,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:22,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:19:22,662 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-06-05 14:19:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:22,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934091976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:22,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:22,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:19:22,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730503900] [2021-06-05 14:19:22,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:19:22,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:22,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:19:22,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:19:22,714 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) [2021-06-05 14:19:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:23,462 INFO L93 Difference]: Finished difference Result 229 states and 650 transitions. [2021-06-05 14:19:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:19:23,462 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 [2021-06-05 14:19:23,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:23,463 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:19:23,463 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:19:23,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 974.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:19:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:19:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 191. [2021-06-05 14:19:23,465 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) [2021-06-05 14:19:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-06-05 14:19:23,466 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-06-05 14:19:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:23,466 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-06-05 14:19:23,466 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) [2021-06-05 14:19:23,466 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-06-05 14:19:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:23,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:23,466 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:23,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-06-05 14:19:23,677 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash -299360958, now seen corresponding path program 40 times [2021-06-05 14:19:23,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:23,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774685123] [2021-06-05 14:19:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:23,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774685123] [2021-06-05 14:19:23,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774685123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834955052] [2021-06-05 14:19:23,954 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 [2021-06-05 14:19:23,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:19:23,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:23,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:24,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,091 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 17 treesize of output 13 [2021-06-05 14:19:24,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,095 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 [2021-06-05 14:19:24,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:24,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,100 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 [2021-06-05 14:19:24,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,152 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. [2021-06-05 14:19:24,152 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:135 [2021-06-05 14:19:24,464 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:19:24,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,469 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 25 treesize of output 19 [2021-06-05 14:19:24,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,473 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 [2021-06-05 14:19:24,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:24,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,478 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 28 treesize of output 22 [2021-06-05 14:19:24,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:24,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,484 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 27 treesize of output 21 [2021-06-05 14:19:24,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,489 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 37 treesize of output 29 [2021-06-05 14:19:24,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:24,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,495 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 17 treesize of output 13 [2021-06-05 14:19:24,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:19:24,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,506 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 [2021-06-05 14:19:24,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,511 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 35 treesize of output 27 [2021-06-05 14:19:24,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:24,517 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 [2021-06-05 14:19:24,517 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,760 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-06-05 14:19:24,760 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-06-05 14:19:24,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,765 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 20 treesize of output 9 [2021-06-05 14:19:24,766 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,770 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 44 treesize of output 19 [2021-06-05 14:19:24,771 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,776 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 24 treesize of output 9 [2021-06-05 14:19:24,776 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,794 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 12 treesize of output 5 [2021-06-05 14:19:24,794 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-05 14:19:24,799 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,812 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 [2021-06-05 14:19:24,812 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:24,817 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:24,830 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,834 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 11 treesize of output 3 [2021-06-05 14:19:24,835 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,846 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 10 treesize of output 5 [2021-06-05 14:19:24,847 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:24,851 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 9 treesize of output 3 [2021-06-05 14:19:24,851 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:24,956 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 14:19:24,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:24,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:24,961 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:403, output treesize:179 [2021-06-05 14:19:25,107 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:19:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834955052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:25,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:25,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:19:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926375314] [2021-06-05 14:19:25,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:19:25,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:19:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:19:25,166 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) [2021-06-05 14:19:25,669 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-05 14:19:25,867 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:19:26,159 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:19:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:26,218 INFO L93 Difference]: Finished difference Result 230 states and 666 transitions. [2021-06-05 14:19:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:19:26,219 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 [2021-06-05 14:19:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:26,219 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:19:26,219 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:19:26,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1326.1ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:19:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:19:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 193. [2021-06-05 14:19:26,222 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) [2021-06-05 14:19:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-06-05 14:19:26,222 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-06-05 14:19:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:26,222 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-06-05 14:19:26,222 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) [2021-06-05 14:19:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-06-05 14:19:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:26,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:26,223 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:26,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:26,425 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1114167112, now seen corresponding path program 41 times [2021-06-05 14:19:26,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:26,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964935085] [2021-06-05 14:19:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:26,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964935085] [2021-06-05 14:19:26,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964935085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281425665] [2021-06-05 14:19:26,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:19:26,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:19:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:26,782 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 [2021-06-05 14:19:26,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:26,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:26,786 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 25 treesize of output 19 [2021-06-05 14:19:26,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:26,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:26,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:19:26,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:26,792 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 27 treesize of output 21 [2021-06-05 14:19:26,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:26,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:26,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:19:26,839 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:19:27,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,013 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 29 treesize of output 23 [2021-06-05 14:19:27,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:27,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,022 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 [2021-06-05 14:19:27,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,030 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 38 treesize of output 30 [2021-06-05 14:19:27,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,039 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 27 treesize of output 21 [2021-06-05 14:19:27,040 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:27,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:19:27,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:27,320 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 14:19:27,321 INFO L628 ElimStorePlain]: treesize reduction 234, result has 57.8 percent of original size [2021-06-05 14:19:27,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,325 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 12 treesize of output 5 [2021-06-05 14:19:27,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,330 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 44 treesize of output 19 [2021-06-05 14:19:27,330 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,344 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 [2021-06-05 14:19:27,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,349 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 [2021-06-05 14:19:27,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,353 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 [2021-06-05 14:19:27,358 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,370 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 20 treesize of output 9 [2021-06-05 14:19:27,370 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,374 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 10 treesize of output 5 [2021-06-05 14:19:27,374 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,472 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 19 treesize of output 15 [2021-06-05 14:19:27,473 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:19:27,477 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,480 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 7 treesize of output 5 [2021-06-05 14:19:27,481 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,566 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 11 treesize of output 3 [2021-06-05 14:19:27,567 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:27,573 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 21 treesize of output 7 [2021-06-05 14:19:27,574 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:27,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:27,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:19:27,656 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:424, output treesize:140 [2021-06-05 14:19:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:27,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281425665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:27,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:27,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:19:27,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991066261] [2021-06-05 14:19:27,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:19:27,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:19:27,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:19:27,798 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) [2021-06-05 14:19:28,138 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 14:19:28,418 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:19:28,660 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 14:19:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:28,720 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-06-05 14:19:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:19:28,721 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 17 [2021-06-05 14:19:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:28,721 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:19:28,721 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:19:28,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1088.4ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:19:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:19:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2021-06-05 14:19:28,724 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) [2021-06-05 14:19:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-06-05 14:19:28,724 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-06-05 14:19:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:28,724 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-06-05 14:19:28,724 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) [2021-06-05 14:19:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-06-05 14:19:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:28,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:28,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:28,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1914,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:28,925 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -92267976, now seen corresponding path program 42 times [2021-06-05 14:19:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:28,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37414126] [2021-06-05 14:19:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:29,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:29,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37414126] [2021-06-05 14:19:29,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37414126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:29,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401012645] [2021-06-05 14:19:29,170 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 [2021-06-05 14:19:29,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:19:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:29,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:29,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,346 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 [2021-06-05 14:19:29,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:29,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:29,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,357 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 15 treesize of output 11 [2021-06-05 14:19:29,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:29,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:29,362 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 27 treesize of output 21 [2021-06-05 14:19:29,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:29,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:29,434 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. [2021-06-05 14:19:29,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-06-05 14:19:30,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:30,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,047 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 15 treesize of output 11 [2021-06-05 14:19:30,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,342 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 106 [2021-06-05 14:19:30,343 INFO L628 ElimStorePlain]: treesize reduction 154, result has 62.4 percent of original size [2021-06-05 14:19:30,343 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 14:19:30,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,348 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 19 treesize of output 15 [2021-06-05 14:19:30,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,435 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 11 treesize of output 3 [2021-06-05 14:19:30,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,522 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 30 treesize of output 24 [2021-06-05 14:19:30,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,528 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 28 treesize of output 22 [2021-06-05 14:19:30,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,616 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 24 treesize of output 9 [2021-06-05 14:19:30,617 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,623 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 21 treesize of output 7 [2021-06-05 14:19:30,624 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,698 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 [2021-06-05 14:19:30,699 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:30,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,775 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 [2021-06-05 14:19:30,775 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,851 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 10 treesize of output 5 [2021-06-05 14:19:30,852 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,856 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 20 treesize of output 9 [2021-06-05 14:19:30,857 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:30,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 14:19:30,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,940 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 19 treesize of output 15 [2021-06-05 14:19:30,941 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:30,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:30,945 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 21 treesize of output 17 [2021-06-05 14:19:30,946 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:31,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:31,015 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 12 treesize of output 5 [2021-06-05 14:19:31,015 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:31,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:31,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:19:31,020 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:31,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:31,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:19:31,085 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:424, output treesize:62 [2021-06-05 14:19:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401012645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:31,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:31,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:19:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116447713] [2021-06-05 14:19:31,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:31,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:31,133 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) [2021-06-05 14:19:31,535 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:19:32,003 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2021-06-05 14:19:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:32,183 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-06-05 14:19:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:32,183 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 [2021-06-05 14:19:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:32,184 INFO L225 Difference]: With dead ends: 214 [2021-06-05 14:19:32,184 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 14:19:32,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1257.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:32,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 14:19:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2021-06-05 14:19:32,186 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) [2021-06-05 14:19:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-06-05 14:19:32,187 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-06-05 14:19:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:32,187 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-06-05 14:19:32,187 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) [2021-06-05 14:19:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-06-05 14:19:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:32,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:32,187 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:32,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1941 [2021-06-05 14:19:32,388 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1323400916, now seen corresponding path program 43 times [2021-06-05 14:19:32,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:32,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434249019] [2021-06-05 14:19:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:32,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:32,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434249019] [2021-06-05 14:19:32,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434249019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:32,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138518662] [2021-06-05 14:19:32,670 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 [2021-06-05 14:19:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,834 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 [2021-06-05 14:19:32,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:32,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:19:32,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:32,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,843 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 15 treesize of output 11 [2021-06-05 14:19:32,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:32,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:32,847 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 [2021-06-05 14:19:32,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:32,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:32,923 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. [2021-06-05 14:19:32,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:171, output treesize:231 [2021-06-05 14:19:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,096 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 17 treesize of output 13 [2021-06-05 14:19:33,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:33,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,371 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-06-05 14:19:33,371 INFO L628 ElimStorePlain]: treesize reduction 221, result has 62.6 percent of original size [2021-06-05 14:19:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,376 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 27 treesize of output 21 [2021-06-05 14:19:33,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:33,492 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 14:19:33,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,497 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 11 treesize of output 3 [2021-06-05 14:19:33,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,501 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 21 treesize of output 7 [2021-06-05 14:19:33,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,632 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 14:19:33,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,637 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 27 treesize of output 21 [2021-06-05 14:19:33,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:33,754 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 14:19:33,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,759 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 10 treesize of output 5 [2021-06-05 14:19:33,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:19:33,764 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,887 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 14:19:33,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,892 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 48 treesize of output 38 [2021-06-05 14:19:33,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,898 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 30 treesize of output 24 [2021-06-05 14:19:33,899 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,903 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 28 treesize of output 22 [2021-06-05 14:19:33,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:19:33,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:33,918 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 30 treesize of output 24 [2021-06-05 14:19:33,919 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:33,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:19:33,923 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,099 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 14:19:34,100 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.4 percent of original size [2021-06-05 14:19:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:34,104 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 44 treesize of output 19 [2021-06-05 14:19:34,104 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:19:34,109 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:34,112 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 12 treesize of output 5 [2021-06-05 14:19:34,113 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:34,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:34,118 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,121 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 21 treesize of output 7 [2021-06-05 14:19:34,122 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:34,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:34,201 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-06-05 14:19:34,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:34,204 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-05 14:19:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138518662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:34,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:34,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:19:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254664076] [2021-06-05 14:19:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:19:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:19:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:19:34,368 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) [2021-06-05 14:19:34,772 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-06-05 14:19:34,984 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 14:19:35,253 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 14:19:35,548 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:19:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:35,618 INFO L93 Difference]: Finished difference Result 235 states and 673 transitions. [2021-06-05 14:19:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:19:35,619 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 [2021-06-05 14:19:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:35,619 INFO L225 Difference]: With dead ends: 235 [2021-06-05 14:19:35,619 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 14:19:35,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1414.6ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:19:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 14:19:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-06-05 14:19:35,622 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) [2021-06-05 14:19:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-06-05 14:19:35,622 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-06-05 14:19:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:35,622 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-06-05 14:19:35,622 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) [2021-06-05 14:19:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-06-05 14:19:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:35,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:35,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:35,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2008 [2021-06-05 14:19:35,823 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 250315536, now seen corresponding path program 44 times [2021-06-05 14:19:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:35,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796364761] [2021-06-05 14:19:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:35,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:35,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796364761] [2021-06-05 14:19:35,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796364761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:35,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011965353] [2021-06-05 14:19:35,983 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 [2021-06-05 14:19:36,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:36,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:36,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:36,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,102 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 [2021-06-05 14:19:36,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,105 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 17 treesize of output 13 [2021-06-05 14:19:36,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,109 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 15 treesize of output 11 [2021-06-05 14:19:36,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:36,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:19:36,155 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-05 14:19:36,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,380 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 25 treesize of output 19 [2021-06-05 14:19:36,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,385 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 35 treesize of output 27 [2021-06-05 14:19:36,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:36,622 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-05 14:19:36,622 INFO L628 ElimStorePlain]: treesize reduction 151, result has 68.4 percent of original size [2021-06-05 14:19:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,628 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 38 treesize of output 30 [2021-06-05 14:19:36,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:36,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,634 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 29 treesize of output 23 [2021-06-05 14:19:36,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:36,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,640 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 28 treesize of output 22 [2021-06-05 14:19:36,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,646 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 19 treesize of output 15 [2021-06-05 14:19:36,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,761 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 14:19:36,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,766 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 [2021-06-05 14:19:36,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:19:36,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,777 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 [2021-06-05 14:19:36,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,783 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 24 treesize of output 9 [2021-06-05 14:19:36,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:36,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,797 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 44 treesize of output 19 [2021-06-05 14:19:36,798 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,802 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 23 treesize of output 11 [2021-06-05 14:19:36,803 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:36,920 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 14:19:36,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:36,926 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:36,931 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:36,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,040 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 14:19:37,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:37,046 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:37,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-06-05 14:19:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,150 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 [2021-06-05 14:19:37,151 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:37,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,155 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 17 treesize of output 13 [2021-06-05 14:19:37,156 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:37,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,260 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 10 treesize of output 5 [2021-06-05 14:19:37,261 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:37,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,265 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 20 treesize of output 9 [2021-06-05 14:19:37,266 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:37,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:37,277 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 9 treesize of output 3 [2021-06-05 14:19:37,277 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:37,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:37,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:37,379 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:404, output treesize:176 [2021-06-05 14:19:37,521 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:19:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:37,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011965353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:37,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:37,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:19:37,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582581931] [2021-06-05 14:19:37,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:19:37,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:37,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:19:37,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:19:37,593 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) [2021-06-05 14:19:37,914 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 14:19:38,063 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-05 14:19:38,258 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 14:19:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:38,294 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-06-05 14:19:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:38,294 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 [2021-06-05 14:19:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:38,295 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:19:38,295 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 14:19:38,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 14:19:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 192. [2021-06-05 14:19:38,297 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) [2021-06-05 14:19:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 568 transitions. [2021-06-05 14:19:38,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 568 transitions. Word has length 17 [2021-06-05 14:19:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:38,298 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 568 transitions. [2021-06-05 14:19:38,298 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) [2021-06-05 14:19:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 568 transitions. [2021-06-05 14:19:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:38,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:38,298 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:38,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:38,499 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash -326980856, now seen corresponding path program 45 times [2021-06-05 14:19:38,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:38,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117635333] [2021-06-05 14:19:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:38,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117635333] [2021-06-05 14:19:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117635333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125791270] [2021-06-05 14:19:38,807 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 [2021-06-05 14:19:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:19:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:38,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:38,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:19:38,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:38,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:38,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:38,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:38,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:38,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:38,903 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 [2021-06-05 14:19:38,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:38,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:38,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:19:38,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:19:39,413 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]} [2021-06-05 14:19:39,418 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 28 treesize of output 22 [2021-06-05 14:19:39,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,424 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 30 treesize of output 24 [2021-06-05 14:19:39,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,569 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-05 14:19:39,569 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.8 percent of original size [2021-06-05 14:19:39,574 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 21 treesize of output 17 [2021-06-05 14:19:39,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,579 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 19 treesize of output 15 [2021-06-05 14:19:39,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,636 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 [2021-06-05 14:19:39,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,693 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 19 treesize of output 15 [2021-06-05 14:19:39,694 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,748 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 7 treesize of output 5 [2021-06-05 14:19:39,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,806 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 27 treesize of output 21 [2021-06-05 14:19:39,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:39,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,863 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 11 treesize of output 3 [2021-06-05 14:19:39,863 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,867 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 12 treesize of output 5 [2021-06-05 14:19:39,868 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,919 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:19:39,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:19:39,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:39,973 INFO L518 ElimStorePlain]: Eliminatee v_prenex_552 vanished before elimination [2021-06-05 14:19:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,977 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 10 treesize of output 5 [2021-06-05 14:19:39,977 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:39,980 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 20 treesize of output 9 [2021-06-05 14:19:39,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:39,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:40,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:40,039 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 [2021-06-05 14:19:40,040 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:40,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:40,043 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 24 treesize of output 9 [2021-06-05 14:19:40,043 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:40,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:40,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:19:40,092 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-05 14:19:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125791270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:40,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:40,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:19:40,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772742905] [2021-06-05 14:19:40,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:19:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:19:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:19:40,140 INFO L87 Difference]: Start difference. First operand 192 states and 568 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:40,512 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 14:19:40,757 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2021-06-05 14:19:40,927 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-05 14:19:41,487 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 126 [2021-06-05 14:19:41,762 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2021-06-05 14:19:41,934 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 14:19:42,209 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 103 [2021-06-05 14:19:42,492 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 109 [2021-06-05 14:19:42,749 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 14:19:42,954 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:19:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:43,050 INFO L93 Difference]: Finished difference Result 304 states and 869 transitions. [2021-06-05 14:19:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:19:43,051 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 [2021-06-05 14:19:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:43,051 INFO L225 Difference]: With dead ends: 304 [2021-06-05 14:19:43,051 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 14:19:43,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2992.9ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:19:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 14:19:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 14:19:43,054 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) [2021-06-05 14:19:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 590 transitions. [2021-06-05 14:19:43,055 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 590 transitions. Word has length 17 [2021-06-05 14:19:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:43,055 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 590 transitions. [2021-06-05 14:19:43,055 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) [2021-06-05 14:19:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 590 transitions. [2021-06-05 14:19:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:43,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:43,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-05 14:19:43,256 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 211426140, now seen corresponding path program 46 times [2021-06-05 14:19:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:43,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745306638] [2021-06-05 14:19:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:43,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745306638] [2021-06-05 14:19:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745306638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:43,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622863500] [2021-06-05 14:19:43,455 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 [2021-06-05 14:19:43,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:19:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:43,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:43,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,565 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 15 treesize of output 11 [2021-06-05 14:19:43,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:43,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,569 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 27 treesize of output 21 [2021-06-05 14:19:43,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,574 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 [2021-06-05 14:19:43,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:43,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,578 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 17 treesize of output 13 [2021-06-05 14:19:43,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:43,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:43,641 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. [2021-06-05 14:19:43,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-06-05 14:19:43,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:19:43,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:43,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:43,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,230 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 108 [2021-06-05 14:19:44,236 INFO L628 ElimStorePlain]: treesize reduction 101, result has 78.0 percent of original size [2021-06-05 14:19:44,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_559 vanished before elimination [2021-06-05 14:19:44,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,242 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 19 treesize of output 15 [2021-06-05 14:19:44,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:19:44,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:44,377 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 14:19:44,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,383 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 38 treesize of output 30 [2021-06-05 14:19:44,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:44,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,390 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 28 treesize of output 22 [2021-06-05 14:19:44,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,522 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 14:19:44,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,529 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 11 treesize of output 3 [2021-06-05 14:19:44,529 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:19:44,535 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,541 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 24 treesize of output 9 [2021-06-05 14:19:44,541 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,684 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 14:19:44,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,690 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 46 treesize of output 15 [2021-06-05 14:19:44,691 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,696 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 24 treesize of output 9 [2021-06-05 14:19:44,697 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,715 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 21 treesize of output 7 [2021-06-05 14:19:44,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,839 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 14:19:44,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,845 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 17 treesize of output 13 [2021-06-05 14:19:44,846 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,851 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 27 treesize of output 21 [2021-06-05 14:19:44,852 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:44,970 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 14:19:44,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 14:19:44,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,982 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 21 treesize of output 7 [2021-06-05 14:19:44,983 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:44,988 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 [2021-06-05 14:19:44,988 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:44,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:45,114 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 14:19:45,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:45,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:45,119 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 27 treesize of output 21 [2021-06-05 14:19:45,120 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:45,240 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 14:19:45,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:45,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:45,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:45,245 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 20 treesize of output 9 [2021-06-05 14:19:45,246 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:45,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:45,250 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 10 treesize of output 5 [2021-06-05 14:19:45,250 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:45,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:45,375 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 14:19:45,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:45,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:45,379 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 15 variables, input treesize:474, output treesize:222 [2021-06-05 14:19:45,544 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 14:19:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:45,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622863500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:45,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:45,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:19:45,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436154504] [2021-06-05 14:19:45,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:19:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:45,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:19:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:19:45,621 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) [2021-06-05 14:19:46,313 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-06-05 14:19:46,586 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2021-06-05 14:19:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:46,667 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-06-05 14:19:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:19:46,667 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 [2021-06-05 14:19:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:46,668 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:19:46,668 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 14:19:46,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1262.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:19:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 14:19:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 194. [2021-06-05 14:19:46,670 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) [2021-06-05 14:19:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-05 14:19:46,671 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-05 14:19:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:46,671 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-05 14:19:46,671 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) [2021-06-05 14:19:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-05 14:19:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:46,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:46,671 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:46,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:46,872 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash 947967822, now seen corresponding path program 47 times [2021-06-05 14:19:46,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:46,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767693398] [2021-06-05 14:19:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:47,092 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 14:19:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:47,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767693398] [2021-06-05 14:19:47,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767693398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:47,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207259831] [2021-06-05 14:19:47,223 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 [2021-06-05 14:19:47,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:19:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:19:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:47,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,378 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 15 treesize of output 11 [2021-06-05 14:19:47,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,383 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 [2021-06-05 14:19:47,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:47,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,389 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 [2021-06-05 14:19:47,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:47,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:47,395 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 35 treesize of output 27 [2021-06-05 14:19:47,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:47,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:47,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:19:47,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:209, output treesize:269 [2021-06-05 14:19:47,852 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-06-05 14:19:48,232 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]} [2021-06-05 14:19:48,244 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 38 treesize of output 30 [2021-06-05 14:19:48,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:48,514 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 180 [2021-06-05 14:19:48,515 INFO L628 ElimStorePlain]: treesize reduction 328, result has 57.4 percent of original size [2021-06-05 14:19:48,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:48,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:48,639 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 14:19:48,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:48,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:19:48,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:48,760 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 14:19:48,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:48,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:19:48,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:49,018 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2021-06-05 14:19:49,018 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.6 percent of original size [2021-06-05 14:19:49,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 14:19:49,026 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:49,144 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 14:19:49,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,152 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 27 treesize of output 21 [2021-06-05 14:19:49,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:49,278 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 14:19:49,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-05 14:19:49,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_587 vanished before elimination [2021-06-05 14:19:49,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-05 14:19:49,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-05 14:19:49,285 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 27 treesize of output 21 [2021-06-05 14:19:49,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:49,416 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 14:19:49,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,416 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-05 14:19:49,424 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 [2021-06-05 14:19:49,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:49,560 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 14:19:49,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_615 vanished before elimination [2021-06-05 14:19:49,568 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 28 treesize of output 22 [2021-06-05 14:19:49,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:49,708 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-06-05 14:19:49,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:49,716 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:49,847 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 14:19:49,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:49,854 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 30 treesize of output 24 [2021-06-05 14:19:49,855 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,107 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 154 [2021-06-05 14:19:50,108 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.9 percent of original size [2021-06-05 14:19:50,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-05 14:19:50,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,115 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 21 treesize of output 7 [2021-06-05 14:19:50,115 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,238 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 14:19:50,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:19:50,246 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,366 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 14:19:50,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,374 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 12 treesize of output 5 [2021-06-05 14:19:50,375 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,381 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 46 treesize of output 15 [2021-06-05 14:19:50,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,513 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 14:19:50,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,521 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 21 treesize of output 7 [2021-06-05 14:19:50,521 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,527 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 11 treesize of output 3 [2021-06-05 14:19:50,528 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,653 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 14:19:50,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,653 INFO L518 ElimStorePlain]: Eliminatee v_prenex_595 vanished before elimination [2021-06-05 14:19:50,653 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-05 14:19:50,653 INFO L518 ElimStorePlain]: Eliminatee v_prenex_598 vanished before elimination [2021-06-05 14:19:50,653 INFO L518 ElimStorePlain]: Eliminatee v_prenex_621 vanished before elimination [2021-06-05 14:19:50,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,660 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 10 treesize of output 5 [2021-06-05 14:19:50,661 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,666 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 20 treesize of output 9 [2021-06-05 14:19:50,667 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,791 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 14:19:50,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,798 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 44 treesize of output 19 [2021-06-05 14:19:50,799 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:19:50,806 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,932 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 14:19:50,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:50,932 INFO L518 ElimStorePlain]: Eliminatee v_prenex_611 vanished before elimination [2021-06-05 14:19:50,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,938 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 [2021-06-05 14:19:50,939 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:50,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:50,944 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:50,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:51,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:51,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-06-05 14:19:51,051 INFO L518 ElimStorePlain]: Eliminatee v_prenex_614 vanished before elimination [2021-06-05 14:19:51,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:51,055 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 21 treesize of output 7 [2021-06-05 14:19:51,056 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:51,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:51,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-05 14:19:51,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:19:51,158 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:51,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:51,253 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-06-05 14:19:51,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 36 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 14:19:51,259 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 54 variables, input treesize:736, output treesize:170 [2021-06-05 14:19:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:51,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207259831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:51,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:51,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:19:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006107686] [2021-06-05 14:19:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:19:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:51,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:19:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:19:51,355 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) [2021-06-05 14:19:51,905 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-06-05 14:19:52,321 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 152 [2021-06-05 14:19:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:52,442 INFO L93 Difference]: Finished difference Result 227 states and 667 transitions. [2021-06-05 14:19:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:19:52,443 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 [2021-06-05 14:19:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:52,443 INFO L225 Difference]: With dead ends: 227 [2021-06-05 14:19:52,443 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:19:52,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1522.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:19:52,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:19:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-06-05 14:19:52,446 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) [2021-06-05 14:19:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 580 transitions. [2021-06-05 14:19:52,446 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 580 transitions. Word has length 17 [2021-06-05 14:19:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:52,446 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 580 transitions. [2021-06-05 14:19:52,446 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) [2021-06-05 14:19:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 580 transitions. [2021-06-05 14:19:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:52,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:52,447 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:52,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:52,647 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:52,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1290551334, now seen corresponding path program 48 times [2021-06-05 14:19:52,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:52,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923685011] [2021-06-05 14:19:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:52,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:52,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923685011] [2021-06-05 14:19:52,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923685011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:52,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116731179] [2021-06-05 14:19:52,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:19:52,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:19:52,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:52,983 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 [2021-06-05 14:19:52,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:52,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:19:52,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:52,996 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 17 treesize of output 13 [2021-06-05 14:19:52,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,000 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 27 treesize of output 21 [2021-06-05 14:19:53,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:53,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:53,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:19:53,055 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:19:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,333 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 [2021-06-05 14:19:53,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,341 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 19 treesize of output 15 [2021-06-05 14:19:53,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,347 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 38 treesize of output 30 [2021-06-05 14:19:53,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:53,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,354 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 28 treesize of output 22 [2021-06-05 14:19:53,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,595 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2021-06-05 14:19:53,596 INFO L628 ElimStorePlain]: treesize reduction 98, result has 78.6 percent of original size [2021-06-05 14:19:53,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,601 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 [2021-06-05 14:19:53,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:53,716 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 14:19:53,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:53,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,721 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 11 treesize of output 3 [2021-06-05 14:19:53,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,726 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 [2021-06-05 14:19:53,727 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:53,846 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 14:19:53,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:53,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:53,960 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 14:19:53,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:53,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,965 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 [2021-06-05 14:19:53,971 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:53,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:53,978 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 [2021-06-05 14:19:53,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,092 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 14:19:54,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:19:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,097 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 20 treesize of output 9 [2021-06-05 14:19:54,098 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,103 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 10 treesize of output 5 [2021-06-05 14:19:54,103 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,115 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 9 treesize of output 3 [2021-06-05 14:19:54,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,220 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 14:19:54,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,225 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 11 treesize of output 3 [2021-06-05 14:19:54,226 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,235 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 21 treesize of output 7 [2021-06-05 14:19:54,236 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:19:54,242 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,246 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 12 treesize of output 5 [2021-06-05 14:19:54,246 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:19:54,259 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-05 14:19:54,263 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:54,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:54,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:19:54,378 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:176 [2021-06-05 14:19:54,520 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 14:19:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116731179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:54,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:54,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:19:54,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081778488] [2021-06-05 14:19:54,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:19:54,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:19:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:19:54,591 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) [2021-06-05 14:19:54,982 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 14:19:55,134 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-05 14:19:55,323 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 14:19:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:55,353 INFO L93 Difference]: Finished difference Result 233 states and 675 transitions. [2021-06-05 14:19:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:19:55,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:19:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:55,354 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:19:55,354 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 14:19:55,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:19:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 14:19:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-06-05 14:19:55,357 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) [2021-06-05 14:19:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-05 14:19:55,358 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-05 14:19:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:55,358 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-05 14:19:55,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-05 14:19:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:55,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:55,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:55,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-05 14:19:55,559 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2132806164, now seen corresponding path program 49 times [2021-06-05 14:19:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:55,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085460896] [2021-06-05 14:19:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:55,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:55,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085460896] [2021-06-05 14:19:55,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085460896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:55,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255878525] [2021-06-05 14:19:55,820 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 [2021-06-05 14:19:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:19:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:55,925 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 15 treesize of output 11 [2021-06-05 14:19:55,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:55,928 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 27 treesize of output 21 [2021-06-05 14:19:55,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:55,932 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 25 treesize of output 19 [2021-06-05 14:19:55,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:19:55,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:55,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:55,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:19:55,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-06-05 14:19:56,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,070 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 [2021-06-05 14:19:56,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:56,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,076 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 28 treesize of output 22 [2021-06-05 14:19:56,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,081 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 [2021-06-05 14:19:56,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,086 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 35 treesize of output 27 [2021-06-05 14:19:56,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:56,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,093 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 37 treesize of output 29 [2021-06-05 14:19:56,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,099 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 17 treesize of output 13 [2021-06-05 14:19:56,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,104 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 25 treesize of output 19 [2021-06-05 14:19:56,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,111 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 18 treesize of output 14 [2021-06-05 14:19:56,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,116 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 [2021-06-05 14:19:56,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,121 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 [2021-06-05 14:19:56,122 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,310 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:19:56,310 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:19:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,315 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 10 treesize of output 5 [2021-06-05 14:19:56,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,320 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 [2021-06-05 14:19:56,321 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,325 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 21 treesize of output 7 [2021-06-05 14:19:56,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,329 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 11 treesize of output 3 [2021-06-05 14:19:56,330 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:56,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,343 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 12 treesize of output 5 [2021-06-05 14:19:56,344 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,348 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 44 treesize of output 19 [2021-06-05 14:19:56,349 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,353 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 12 treesize of output 5 [2021-06-05 14:19:56,354 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:56,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:56,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:19:56,371 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,374 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 11 treesize of output 3 [2021-06-05 14:19:56,374 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:56,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:56,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:56,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:19:56,459 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:19:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:56,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255878525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:56,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:56,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:19:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032432376] [2021-06-05 14:19:56,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:19:56,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:19:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:19:56,608 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) [2021-06-05 14:19:57,377 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-06-05 14:19:57,764 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-06-05 14:19:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:57,810 INFO L93 Difference]: Finished difference Result 312 states and 879 transitions. [2021-06-05 14:19:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:19:57,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:19:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:57,811 INFO L225 Difference]: With dead ends: 312 [2021-06-05 14:19:57,811 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:19:57,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1342.1ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:19:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:19:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 199. [2021-06-05 14:19:57,814 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) [2021-06-05 14:19:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-06-05 14:19:57,815 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-06-05 14:19:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:57,815 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-06-05 14:19:57,815 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) [2021-06-05 14:19:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-06-05 14:19:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:19:57,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:57,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:58,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2293 [2021-06-05 14:19:58,029 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:19:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 213094778, now seen corresponding path program 50 times [2021-06-05 14:19:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:58,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344990748] [2021-06-05 14:19:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:19:58,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344990748] [2021-06-05 14:19:58,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344990748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:58,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068260104] [2021-06-05 14:19:58,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:19:58,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:58,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:58,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:19:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,690 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 35 treesize of output 27 [2021-06-05 14:19:58,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:19:58,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,697 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 [2021-06-05 14:19:58,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:58,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,704 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 [2021-06-05 14:19:58,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:58,817 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 14:19:58,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,831 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 [2021-06-05 14:19:58,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:58,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,838 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 25 treesize of output 19 [2021-06-05 14:19:58,839 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:58,845 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 15 treesize of output 11 [2021-06-05 14:19:58,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:58,949 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 14:19:58,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:58,971 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. [2021-06-05 14:19:58,971 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:258, output treesize:300 [2021-06-05 14:19:59,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,420 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 [2021-06-05 14:19:59,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:19:59,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,426 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 [2021-06-05 14:19:59,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,696 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2021-06-05 14:19:59,697 INFO L628 ElimStorePlain]: treesize reduction 234, result has 63.1 percent of original size [2021-06-05 14:19:59,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:19:59,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,814 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 14:19:59,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:19:59,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-06-05 14:19:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:19:59,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,826 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 [2021-06-05 14:19:59,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,832 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 47 treesize of output 37 [2021-06-05 14:19:59,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,839 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 18 treesize of output 14 [2021-06-05 14:19:59,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:19:59,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:19:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:19:59,849 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 27 treesize of output 21 [2021-06-05 14:19:59,849 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,019 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-05 14:20:00,020 INFO L628 ElimStorePlain]: treesize reduction 22, result has 93.1 percent of original size [2021-06-05 14:20:00,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,024 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 27 treesize of output 21 [2021-06-05 14:20:00,025 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:00,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-06-05 14:20:00,120 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,125 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 [2021-06-05 14:20:00,125 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,130 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 [2021-06-05 14:20:00,131 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,136 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 [2021-06-05 14:20:00,136 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,140 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 12 treesize of output 5 [2021-06-05 14:20:00,141 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:00,230 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:00,234 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:00,329 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:00,332 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 11 treesize of output 3 [2021-06-05 14:20:00,333 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:00,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:00,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 14:20:00,427 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:631, output treesize:83 [2021-06-05 14:20:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:00,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068260104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:00,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:00,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:20:00,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691099576] [2021-06-05 14:20:00,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:00,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:00,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:00,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:00,476 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) [2021-06-05 14:20:00,985 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 14:20:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:01,190 INFO L93 Difference]: Finished difference Result 232 states and 673 transitions. [2021-06-05 14:20:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:20:01,190 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 [2021-06-05 14:20:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:01,191 INFO L225 Difference]: With dead ends: 232 [2021-06-05 14:20:01,191 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 14:20:01,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1058.9ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 14:20:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2021-06-05 14:20:01,193 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) [2021-06-05 14:20:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 594 transitions. [2021-06-05 14:20:01,194 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 594 transitions. Word has length 17 [2021-06-05 14:20:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:01,194 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 594 transitions. [2021-06-05 14:20:01,194 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) [2021-06-05 14:20:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 594 transitions. [2021-06-05 14:20:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:01,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:01,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:01,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2309,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:01,395 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1694332648, now seen corresponding path program 51 times [2021-06-05 14:20:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:01,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116834046] [2021-06-05 14:20:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:01,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:01,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116834046] [2021-06-05 14:20:01,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116834046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:01,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112270934] [2021-06-05 14:20:01,542 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 [2021-06-05 14:20:01,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:20:01,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:01,681 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 29 treesize of output 23 [2021-06-05 14:20:01,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:01,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:20:01,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:01,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:01,694 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 17 treesize of output 13 [2021-06-05 14:20:01,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,697 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 17 treesize of output 13 [2021-06-05 14:20:01,697 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,756 INFO L628 ElimStorePlain]: treesize reduction 20, result has 86.2 percent of original size [2021-06-05 14:20:01,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:01,757 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:167, output treesize:125 [2021-06-05 14:20:01,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:01,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:01,905 INFO L628 ElimStorePlain]: treesize reduction 46, result has 74.2 percent of original size [2021-06-05 14:20:01,906 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:20:01,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:20:01,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,946 INFO L628 ElimStorePlain]: treesize reduction 33, result has 71.6 percent of original size [2021-06-05 14:20:01,946 INFO L518 ElimStorePlain]: Eliminatee v_prenex_652 vanished before elimination [2021-06-05 14:20:01,949 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 21 treesize of output 17 [2021-06-05 14:20:01,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,951 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 19 treesize of output 15 [2021-06-05 14:20:01,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,953 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 28 treesize of output 22 [2021-06-05 14:20:01,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:01,973 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:20:01,973 INFO L518 ElimStorePlain]: Eliminatee v_prenex_654 vanished before elimination [2021-06-05 14:20:01,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:01,974 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:20:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112270934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:20:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91565416] [2021-06-05 14:20:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:20:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:20:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:20:02,006 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) [2021-06-05 14:20:02,509 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2021-06-05 14:20:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:02,548 INFO L93 Difference]: Finished difference Result 231 states and 671 transitions. [2021-06-05 14:20:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:20:02,549 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 [2021-06-05 14:20:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:02,549 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:20:02,549 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 14:20:02,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:20:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 14:20:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-06-05 14:20:02,552 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) [2021-06-05 14:20:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-06-05 14:20:02,552 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 17 [2021-06-05 14:20:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:02,552 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-06-05 14:20:02,552 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) [2021-06-05 14:20:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-06-05 14:20:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:02,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:02,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:02,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2357 [2021-06-05 14:20:02,753 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:02,754 INFO L82 PathProgramCache]: Analyzing trace with hash -812726634, now seen corresponding path program 52 times [2021-06-05 14:20:02,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:02,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014201480] [2021-06-05 14:20:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014201480] [2021-06-05 14:20:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014201480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006572546] [2021-06-05 14:20:02,977 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 [2021-06-05 14:20:03,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:20:03,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:03,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:03,094 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 [2021-06-05 14:20:03,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:03,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:03,101 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 15 treesize of output 11 [2021-06-05 14:20:03,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:20:03,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:03,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:03,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:20:03,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,216 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 27 treesize of output 21 [2021-06-05 14:20:03,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,220 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 [2021-06-05 14:20:03,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,224 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 [2021-06-05 14:20:03,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:03,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:03,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:03,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:03,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,238 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 37 treesize of output 29 [2021-06-05 14:20:03,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:03,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:03,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,247 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 [2021-06-05 14:20:03,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,251 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 27 treesize of output 21 [2021-06-05 14:20:03,252 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,255 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 18 treesize of output 14 [2021-06-05 14:20:03,255 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,431 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:20:03,432 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-05 14:20:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,436 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 [2021-06-05 14:20:03,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:20:03,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:03,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,448 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 11 treesize of output 3 [2021-06-05 14:20:03,449 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:03,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,466 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 [2021-06-05 14:20:03,466 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:20:03,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,475 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 12 treesize of output 5 [2021-06-05 14:20:03,476 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:03,493 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 21 treesize of output 7 [2021-06-05 14:20:03,494 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,498 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 [2021-06-05 14:20:03,499 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:03,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:03,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:03,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:03,583 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:20:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:03,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006572546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:03,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:03,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 14:20:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648592503] [2021-06-05 14:20:03,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:20:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:20:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:20:03,715 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) [2021-06-05 14:20:04,410 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:20:04,600 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 14:20:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:04,659 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2021-06-05 14:20:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:20:04,660 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 [2021-06-05 14:20:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:04,660 INFO L225 Difference]: With dead ends: 267 [2021-06-05 14:20:04,661 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 14:20:04,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1008.4ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:20:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 14:20:04,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 199. [2021-06-05 14:20:04,663 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) [2021-06-05 14:20:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-05 14:20:04,663 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-05 14:20:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:04,664 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-05 14:20:04,664 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) [2021-06-05 14:20:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-05 14:20:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:04,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:04,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:04,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2380 [2021-06-05 14:20:04,881 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash 668511236, now seen corresponding path program 53 times [2021-06-05 14:20:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:04,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350011985] [2021-06-05 14:20:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:05,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:05,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350011985] [2021-06-05 14:20:05,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350011985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:05,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924053599] [2021-06-05 14:20:05,231 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 [2021-06-05 14:20:05,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:20:05,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:05,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:05,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:05,358 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 35 treesize of output 27 [2021-06-05 14:20:05,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:05,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:05,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:05,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:05,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,370 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 [2021-06-05 14:20:05,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:05,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:05,426 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-06-05 14:20:05,533 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]} [2021-06-05 14:20:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:05,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,542 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 27 treesize of output 21 [2021-06-05 14:20:05,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:05,736 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-06-05 14:20:05,736 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.6 percent of original size [2021-06-05 14:20:05,740 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 30 treesize of output 24 [2021-06-05 14:20:05,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:05,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,749 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 28 treesize of output 22 [2021-06-05 14:20:05,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,754 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 [2021-06-05 14:20:05,755 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,759 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 28 treesize of output 22 [2021-06-05 14:20:05,760 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,763 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 48 treesize of output 38 [2021-06-05 14:20:05,764 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,899 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 14:20:05,899 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.2 percent of original size [2021-06-05 14:20:05,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:20:05,904 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:05,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:05,971 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:06,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,042 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 21 treesize of output 7 [2021-06-05 14:20:06,042 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,045 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 [2021-06-05 14:20:06,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,119 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:20:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,122 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 [2021-06-05 14:20:06,123 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,126 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 21 treesize of output 7 [2021-06-05 14:20:06,127 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,130 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 12 treesize of output 5 [2021-06-05 14:20:06,131 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,134 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 [2021-06-05 14:20:06,135 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,137 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 [2021-06-05 14:20:06,138 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:06,203 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 10 treesize of output 5 [2021-06-05 14:20:06,203 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,206 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 20 treesize of output 9 [2021-06-05 14:20:06,206 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:06,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:06,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:06,279 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:20:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:06,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924053599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:06,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:06,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 14:20:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605335795] [2021-06-05 14:20:06,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:20:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:06,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:20:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:20:06,424 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) [2021-06-05 14:20:07,061 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-05 14:20:07,373 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-05 14:20:07,645 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 14:20:07,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:07,723 INFO L93 Difference]: Finished difference Result 255 states and 741 transitions. [2021-06-05 14:20:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:20:07,724 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 [2021-06-05 14:20:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:07,724 INFO L225 Difference]: With dead ends: 255 [2021-06-05 14:20:07,724 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 14:20:07,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1563.8ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:20:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 14:20:07,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 194. [2021-06-05 14:20:07,727 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) [2021-06-05 14:20:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-05 14:20:07,727 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-05 14:20:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:07,727 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-05 14:20:07,727 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) [2021-06-05 14:20:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-05 14:20:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:07,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:07,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:07,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2398 [2021-06-05 14:20:07,928 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash 672434372, now seen corresponding path program 54 times [2021-06-05 14:20:07,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:07,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108604657] [2021-06-05 14:20:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:08,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108604657] [2021-06-05 14:20:08,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108604657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250076849] [2021-06-05 14:20:08,185 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 [2021-06-05 14:20:08,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:20:08,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:08,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:08,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:08,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:08,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,308 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 [2021-06-05 14:20:08,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:08,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:08,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:08,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:08,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:08,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:08,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:08,391 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. [2021-06-05 14:20:08,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:187, output treesize:243 [2021-06-05 14:20:08,849 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]} [2021-06-05 14:20:08,854 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 17 treesize of output 13 [2021-06-05 14:20:08,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:08,859 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 [2021-06-05 14:20:08,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:08,971 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-05 14:20:08,971 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.7 percent of original size [2021-06-05 14:20:08,975 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 27 treesize of output 21 [2021-06-05 14:20:08,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:09,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:09,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:20:09,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:09,083 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:09,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,135 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 29 treesize of output 23 [2021-06-05 14:20:09,136 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-06-05 14:20:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,190 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 [2021-06-05 14:20:09,190 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:09,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:20:09,253 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,256 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 20 treesize of output 9 [2021-06-05 14:20:09,257 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,305 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 21 treesize of output 7 [2021-06-05 14:20:09,306 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,309 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 [2021-06-05 14:20:09,309 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:09,363 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 12 treesize of output 5 [2021-06-05 14:20:09,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:09,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:09,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:09,409 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-06-05 14:20:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:09,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250076849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:09,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:09,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:20:09,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154892013] [2021-06-05 14:20:09,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:09,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:09,462 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) [2021-06-05 14:20:09,899 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-06-05 14:20:10,241 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2021-06-05 14:20:10,523 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-06-05 14:20:10,953 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2021-06-05 14:20:11,322 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 127 [2021-06-05 14:20:11,591 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-06-05 14:20:11,986 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 118 [2021-06-05 14:20:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:12,118 INFO L93 Difference]: Finished difference Result 272 states and 787 transitions. [2021-06-05 14:20:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:20:12,119 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 [2021-06-05 14:20:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:12,119 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:20:12,119 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:20:12,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2681.9ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:20:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:20:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 198. [2021-06-05 14:20:12,122 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) [2021-06-05 14:20:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-05 14:20:12,122 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-05 14:20:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:12,122 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-05 14:20:12,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-05 14:20:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:12,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:12,123 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:12,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:12,323 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1633532686, now seen corresponding path program 55 times [2021-06-05 14:20:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:12,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475992750] [2021-06-05 14:20:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:12,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475992750] [2021-06-05 14:20:12,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475992750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:12,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117263081] [2021-06-05 14:20:12,502 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 [2021-06-05 14:20:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:12,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:12,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,712 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 35 treesize of output 27 [2021-06-05 14:20:12,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,718 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 [2021-06-05 14:20:12,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:12,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,729 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 15 treesize of output 11 [2021-06-05 14:20:12,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:12,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:12,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:12,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:12,818 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. [2021-06-05 14:20:12,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:191, output treesize:247 [2021-06-05 14:20:13,173 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]} [2021-06-05 14:20:13,177 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 17 treesize of output 13 [2021-06-05 14:20:13,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:13,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,260 INFO L628 ElimStorePlain]: treesize reduction 141, result has 43.6 percent of original size [2021-06-05 14:20:13,263 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 [2021-06-05 14:20:13,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:20:13,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:13,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:13,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,344 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:20:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:13,347 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 12 treesize of output 5 [2021-06-05 14:20:13,348 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:13,377 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 11 treesize of output 3 [2021-06-05 14:20:13,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:13,406 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 21 treesize of output 7 [2021-06-05 14:20:13,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:13,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:13,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:13,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:20:13,443 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:264, output treesize:38 [2021-06-05 14:20:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:13,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117263081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:13,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:13,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:20:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677691278] [2021-06-05 14:20:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:13,475 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) [2021-06-05 14:20:13,991 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-06-05 14:20:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:14,059 INFO L93 Difference]: Finished difference Result 230 states and 670 transitions. [2021-06-05 14:20:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:20:14,059 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 [2021-06-05 14:20:14,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:14,059 INFO L225 Difference]: With dead ends: 230 [2021-06-05 14:20:14,060 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:20:14,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 849.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:20:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-06-05 14:20:14,062 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) [2021-06-05 14:20:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 600 transitions. [2021-06-05 14:20:14,062 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 600 transitions. Word has length 17 [2021-06-05 14:20:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:14,063 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 600 transitions. [2021-06-05 14:20:14,063 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) [2021-06-05 14:20:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 600 transitions. [2021-06-05 14:20:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:14,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:14,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:14,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-06-05 14:20:14,264 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1386912514, now seen corresponding path program 56 times [2021-06-05 14:20:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:14,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298819462] [2021-06-05 14:20:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:14,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:14,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298819462] [2021-06-05 14:20:14,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298819462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:14,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917580705] [2021-06-05 14:20:14,439 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 [2021-06-05 14:20:14,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:14,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,623 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 [2021-06-05 14:20:14,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,628 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 35 treesize of output 27 [2021-06-05 14:20:14,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:14,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:14,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:14,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:14,712 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. [2021-06-05 14:20:14,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-06-05 14:20:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,888 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 29 treesize of output 23 [2021-06-05 14:20:14,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,894 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 [2021-06-05 14:20:14,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,901 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 29 treesize of output 23 [2021-06-05 14:20:14,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:14,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:14,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-06-05 14:20:14,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:14,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:14,925 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:14,930 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 47 treesize of output 37 [2021-06-05 14:20:14,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,136 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-05 14:20:15,137 INFO L628 ElimStorePlain]: treesize reduction 206, result has 58.2 percent of original size [2021-06-05 14:20:15,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,142 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 [2021-06-05 14:20:15,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,148 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 12 treesize of output 5 [2021-06-05 14:20:15,148 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,153 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 46 treesize of output 15 [2021-06-05 14:20:15,154 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,158 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 20 treesize of output 9 [2021-06-05 14:20:15,159 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,163 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 [2021-06-05 14:20:15,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:15,246 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:15,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:15,336 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,340 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 21 treesize of output 7 [2021-06-05 14:20:15,341 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,432 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 27 treesize of output 21 [2021-06-05 14:20:15,433 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:15,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,521 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 [2021-06-05 14:20:15,522 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:15,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:15,526 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:20:15,620 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:15,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:15,701 INFO L518 ElimStorePlain]: Eliminatee v_prenex_697 vanished before elimination [2021-06-05 14:20:15,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:15,704 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-06-05 14:20:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:15,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917580705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:15,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:15,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:20:15,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965885911] [2021-06-05 14:20:15,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:15,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:15,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:15,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:15,849 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) [2021-06-05 14:20:16,582 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 14:20:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:16,643 INFO L93 Difference]: Finished difference Result 241 states and 703 transitions. [2021-06-05 14:20:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:16,651 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 [2021-06-05 14:20:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:16,652 INFO L225 Difference]: With dead ends: 241 [2021-06-05 14:20:16,652 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 14:20:16,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 881.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 14:20:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2021-06-05 14:20:16,655 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) [2021-06-05 14:20:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-06-05 14:20:16,655 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-06-05 14:20:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:16,656 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-06-05 14:20:16,656 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) [2021-06-05 14:20:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-06-05 14:20:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:16,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:16,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:16,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:16,861 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1560160206, now seen corresponding path program 57 times [2021-06-05 14:20:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:16,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865164287] [2021-06-05 14:20:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:17,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:17,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865164287] [2021-06-05 14:20:17,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865164287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:17,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530966698] [2021-06-05 14:20:17,050 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 [2021-06-05 14:20:17,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:20:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:20:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,396 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 27 treesize of output 21 [2021-06-05 14:20:17,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,401 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 [2021-06-05 14:20:17,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,455 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 25 treesize of output 19 [2021-06-05 14:20:17,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,461 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 [2021-06-05 14:20:17,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,513 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. [2021-06-05 14:20:17,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:134, output treesize:124 [2021-06-05 14:20:17,673 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]} [2021-06-05 14:20:17,678 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 25 treesize of output 19 [2021-06-05 14:20:17,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,781 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-06-05 14:20:17,782 INFO L628 ElimStorePlain]: treesize reduction 152, result has 46.9 percent of original size [2021-06-05 14:20:17,785 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 19 treesize of output 15 [2021-06-05 14:20:17,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,789 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 28 treesize of output 22 [2021-06-05 14:20:17,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:17,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:17,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,859 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 27 treesize of output 21 [2021-06-05 14:20:17,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:17,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_704 vanished before elimination [2021-06-05 14:20:17,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,902 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 21 treesize of output 7 [2021-06-05 14:20:17,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,906 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 11 treesize of output 3 [2021-06-05 14:20:17,907 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,947 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 20 treesize of output 9 [2021-06-05 14:20:17,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:20:17,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:17,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:17,997 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 [2021-06-05 14:20:17,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:18,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:18,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:18,001 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:18,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:18,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:18,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:18,044 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-06-05 14:20:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:18,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530966698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:20:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469987144] [2021-06-05 14:20:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:18,099 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) [2021-06-05 14:20:18,729 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 14:20:18,901 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 14:20:19,151 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 100 [2021-06-05 14:20:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:19,261 INFO L93 Difference]: Finished difference Result 231 states and 678 transitions. [2021-06-05 14:20:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:20:19,261 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 [2021-06-05 14:20:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:19,261 INFO L225 Difference]: With dead ends: 231 [2021-06-05 14:20:19,262 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 14:20:19,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1243.2ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:20:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 14:20:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2021-06-05 14:20:19,264 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) [2021-06-05 14:20:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-05 14:20:19,264 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-05 14:20:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:19,264 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-05 14:20:19,264 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) [2021-06-05 14:20:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-05 14:20:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:19,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:19,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:19,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:19,465 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1698524914, now seen corresponding path program 58 times [2021-06-05 14:20:19,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:19,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784343064] [2021-06-05 14:20:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:19,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:19,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784343064] [2021-06-05 14:20:19,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784343064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:19,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494034085] [2021-06-05 14:20:19,685 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 [2021-06-05 14:20:19,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:20:19,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:19,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,800 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 [2021-06-05 14:20:19,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:19,803 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 15 treesize of output 11 [2021-06-05 14:20:19,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,806 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 17 treesize of output 13 [2021-06-05 14:20:19,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:19,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:19,835 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:20:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,933 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 27 treesize of output 21 [2021-06-05 14:20:19,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,938 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 [2021-06-05 14:20:19,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:20:19,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:19,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:19,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:19,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:19,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,959 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 37 treesize of output 29 [2021-06-05 14:20:19,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:19,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:19,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:19,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:19,974 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 27 treesize of output 21 [2021-06-05 14:20:19,975 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:19,978 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 18 treesize of output 14 [2021-06-05 14:20:19,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,126 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:20:20,127 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-05 14:20:20,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,130 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 [2021-06-05 14:20:20,131 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,134 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 [2021-06-05 14:20:20,135 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,138 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 [2021-06-05 14:20:20,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,142 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 [2021-06-05 14:20:20,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,152 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 12 treesize of output 5 [2021-06-05 14:20:20,153 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,156 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 44 treesize of output 19 [2021-06-05 14:20:20,157 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,160 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 [2021-06-05 14:20:20,160 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:20,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:20,172 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 21 treesize of output 7 [2021-06-05 14:20:20,173 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,175 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 [2021-06-05 14:20:20,176 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:20,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:20,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:20,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:20,244 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:20:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:20,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494034085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:20,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:20,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:20:20,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583823576] [2021-06-05 14:20:20,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:20,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:20,377 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) [2021-06-05 14:20:20,917 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:20:21,097 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:20:21,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:21,141 INFO L93 Difference]: Finished difference Result 225 states and 659 transitions. [2021-06-05 14:20:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:21,141 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 [2021-06-05 14:20:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:21,142 INFO L225 Difference]: With dead ends: 225 [2021-06-05 14:20:21,142 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:20:21,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:20:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:20:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-06-05 14:20:21,144 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) [2021-06-05 14:20:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-05 14:20:21,144 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-05 14:20:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:21,144 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-05 14:20:21,145 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) [2021-06-05 14:20:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-05 14:20:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:21,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:21,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:21,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-06-05 14:20:21,346 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -217287044, now seen corresponding path program 59 times [2021-06-05 14:20:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:21,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629557345] [2021-06-05 14:20:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:21,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:21,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629557345] [2021-06-05 14:20:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629557345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477581090] [2021-06-05 14:20:21,597 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 [2021-06-05 14:20:21,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:20:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,792 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 15 treesize of output 11 [2021-06-05 14:20:21,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,796 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 [2021-06-05 14:20:21,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:21,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,801 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 [2021-06-05 14:20:21,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:21,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:21,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:21,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:21,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:21,888 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. [2021-06-05 14:20:21,888 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:191, output treesize:251 [2021-06-05 14:20:22,092 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-05 14:20:22,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,098 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 30 treesize of output 24 [2021-06-05 14:20:22,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,104 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 28 treesize of output 22 [2021-06-05 14:20:22,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:22,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,116 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 17 treesize of output 13 [2021-06-05 14:20:22,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:22,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:22,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,134 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 [2021-06-05 14:20:22,134 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,140 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 46 treesize of output 36 [2021-06-05 14:20:22,141 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:20:22,148 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,154 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 15 treesize of output 11 [2021-06-05 14:20:22,154 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,160 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 27 treesize of output 21 [2021-06-05 14:20:22,161 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,167 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 28 treesize of output 22 [2021-06-05 14:20:22,168 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,173 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 48 treesize of output 38 [2021-06-05 14:20:22,174 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,180 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 [2021-06-05 14:20:22,181 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,423 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 14:20:22,424 INFO L628 ElimStorePlain]: treesize reduction 203, result has 61.9 percent of original size [2021-06-05 14:20:22,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:22,430 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:22,435 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:22,449 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,454 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 10 treesize of output 5 [2021-06-05 14:20:22,455 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,459 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 [2021-06-05 14:20:22,460 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:22,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,472 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 11 treesize of output 3 [2021-06-05 14:20:22,473 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,477 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 [2021-06-05 14:20:22,478 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:22,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:22,490 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:22,494 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 44 treesize of output 19 [2021-06-05 14:20:22,495 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:22,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:22,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:22,590 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:675, output treesize:151 [2021-06-05 14:20:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:22,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477581090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:22,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:22,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 14:20:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396451128] [2021-06-05 14:20:22,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:22,758 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) [2021-06-05 14:20:23,102 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-06-05 14:20:23,289 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 14:20:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:23,447 INFO L93 Difference]: Finished difference Result 234 states and 673 transitions. [2021-06-05 14:20:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:23,447 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 [2021-06-05 14:20:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:23,448 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:20:23,448 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:20:23,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:20:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2021-06-05 14:20:23,451 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) [2021-06-05 14:20:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 598 transitions. [2021-06-05 14:20:23,451 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 598 transitions. Word has length 17 [2021-06-05 14:20:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:23,452 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 598 transitions. [2021-06-05 14:20:23,452 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) [2021-06-05 14:20:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 598 transitions. [2021-06-05 14:20:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:23,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:23,452 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:23,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2571,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:23,657 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1888263060, now seen corresponding path program 60 times [2021-06-05 14:20:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353173211] [2021-06-05 14:20:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:23,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353173211] [2021-06-05 14:20:23,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353173211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230800805] [2021-06-05 14:20:23,883 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 [2021-06-05 14:20:23,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:20:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:24,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:24,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:24,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,065 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 27 treesize of output 21 [2021-06-05 14:20:24,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:24,068 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 25 treesize of output 19 [2021-06-05 14:20:24,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,071 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 17 treesize of output 13 [2021-06-05 14:20:24,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,074 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 17 treesize of output 13 [2021-06-05 14:20:24,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,133 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-05 14:20:24,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:24,134 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-05 14:20:24,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:24,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:24,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:24,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,255 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-05 14:20:24,255 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-06-05 14:20:24,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:20:24,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,260 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 28 treesize of output 22 [2021-06-05 14:20:24,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:20:24,263 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:24,283 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:20:24,283 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-06-05 14:20:24,283 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:20:24,283 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:20:24,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:24,284 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:20:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:24,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230800805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:24,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:24,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:20:24,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580296879] [2021-06-05 14:20:24,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:24,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:24,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:24,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:24,315 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) [2021-06-05 14:20:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:24,986 INFO L93 Difference]: Finished difference Result 234 states and 665 transitions. [2021-06-05 14:20:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:20:24,986 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 [2021-06-05 14:20:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:24,987 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:20:24,987 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 14:20:24,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:20:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 14:20:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 195. [2021-06-05 14:20:24,990 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) [2021-06-05 14:20:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-05 14:20:24,990 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-06-05 14:20:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:24,991 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-05 14:20:24,991 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) [2021-06-05 14:20:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-05 14:20:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:24,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:24,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:25,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2603,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:25,205 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 331629366, now seen corresponding path program 61 times [2021-06-05 14:20:25,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:25,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813904131] [2021-06-05 14:20:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:25,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813904131] [2021-06-05 14:20:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813904131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:25,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686515482] [2021-06-05 14:20:25,505 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 [2021-06-05 14:20:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:25,609 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 [2021-06-05 14:20:25,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:25,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:25,616 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 15 treesize of output 11 [2021-06-05 14:20:25,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,619 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 17 treesize of output 13 [2021-06-05 14:20:25,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:25,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:25,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:20:25,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:25,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:25,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:25,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:20:25,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:25,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,745 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 35 treesize of output 27 [2021-06-05 14:20:25,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:25,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,750 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 37 treesize of output 29 [2021-06-05 14:20:25,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:25,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,755 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 17 treesize of output 13 [2021-06-05 14:20:25,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,760 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 18 treesize of output 14 [2021-06-05 14:20:25,761 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,764 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 27 treesize of output 21 [2021-06-05 14:20:25,765 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,769 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 25 treesize of output 19 [2021-06-05 14:20:25,769 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,773 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 15 treesize of output 11 [2021-06-05 14:20:25,773 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,923 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:20:25,923 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:20:25,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,927 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 10 treesize of output 5 [2021-06-05 14:20:25,927 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:20:25,931 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:25,935 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,948 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 11 treesize of output 3 [2021-06-05 14:20:25,948 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:25,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,958 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 12 treesize of output 5 [2021-06-05 14:20:25,959 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,962 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 44 treesize of output 19 [2021-06-05 14:20:25,962 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,965 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 12 treesize of output 5 [2021-06-05 14:20:25,966 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:25,978 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 21 treesize of output 7 [2021-06-05 14:20:25,978 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,981 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 11 treesize of output 3 [2021-06-05 14:20:25,981 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:25,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:26,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:26,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:26,049 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:20:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:26,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686515482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:26,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:26,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:20:26,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187976167] [2021-06-05 14:20:26,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:26,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:26,184 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) [2021-06-05 14:20:26,680 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:20:26,895 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:20:27,190 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:20:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:27,249 INFO L93 Difference]: Finished difference Result 235 states and 681 transitions. [2021-06-05 14:20:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:20:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:20:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:27,250 INFO L225 Difference]: With dead ends: 235 [2021-06-05 14:20:27,250 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 14:20:27,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1161.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:20:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 14:20:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 197. [2021-06-05 14:20:27,252 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) [2021-06-05 14:20:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-06-05 14:20:27,253 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-06-05 14:20:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:27,253 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-06-05 14:20:27,253 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) [2021-06-05 14:20:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-06-05 14:20:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:27,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:27,253 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:27,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2626 [2021-06-05 14:20:27,454 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash -483176788, now seen corresponding path program 62 times [2021-06-05 14:20:27,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:27,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347182474] [2021-06-05 14:20:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:27,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347182474] [2021-06-05 14:20:27,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347182474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:27,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127092554] [2021-06-05 14:20:27,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:20:27,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:27,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:27,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:27,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:27,963 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 17 treesize of output 13 [2021-06-05 14:20:27,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:27,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:28,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,024 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 27 treesize of output 21 [2021-06-05 14:20:28,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:28,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,080 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. [2021-06-05 14:20:28,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:157 [2021-06-05 14:20:28,247 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-05 14:20:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,254 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 19 treesize of output 15 [2021-06-05 14:20:28,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,261 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 [2021-06-05 14:20:28,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,268 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 [2021-06-05 14:20:28,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,275 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 25 treesize of output 19 [2021-06-05 14:20:28,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 14:20:28,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:28,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:20:28,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,308 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 28 treesize of output 22 [2021-06-05 14:20:28,309 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,316 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 [2021-06-05 14:20:28,317 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:28,324 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 29 treesize of output 23 [2021-06-05 14:20:28,325 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:28,612 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 14:20:28,612 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-06-05 14:20:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,617 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 9 treesize of output 3 [2021-06-05 14:20:28,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,623 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 11 treesize of output 3 [2021-06-05 14:20:28,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:28,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,633 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 11 treesize of output 3 [2021-06-05 14:20:28,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,646 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 24 treesize of output 9 [2021-06-05 14:20:28,647 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,651 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 46 treesize of output 15 [2021-06-05 14:20:28,652 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,669 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 20 treesize of output 9 [2021-06-05 14:20:28,669 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:20:28,674 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,687 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 21 treesize of output 7 [2021-06-05 14:20:28,687 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,692 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 12 treesize of output 5 [2021-06-05 14:20:28,692 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:28,696 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 24 treesize of output 9 [2021-06-05 14:20:28,697 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:28,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,817 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 14:20:28,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:28,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:28,821 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:457, output treesize:197 [2021-06-05 14:20:28,953 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 14:20:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:29,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127092554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:29,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:29,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:20:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094840758] [2021-06-05 14:20:29,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:29,014 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) [2021-06-05 14:20:29,558 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:20:29,736 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:20:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:29,809 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-06-05 14:20:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:29,810 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 [2021-06-05 14:20:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:29,810 INFO L225 Difference]: With dead ends: 221 [2021-06-05 14:20:29,810 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:20:29,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:20:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:20:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-06-05 14:20:29,812 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) [2021-06-05 14:20:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-05 14:20:29,813 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-06-05 14:20:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-05 14:20:29,813 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) [2021-06-05 14:20:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-05 14:20:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:29,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:29,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:30,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-06-05 14:20:30,014 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:30,014 INFO L82 PathProgramCache]: Analyzing trace with hash 538722348, now seen corresponding path program 63 times [2021-06-05 14:20:30,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390506393] [2021-06-05 14:20:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:30,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:30,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390506393] [2021-06-05 14:20:30,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390506393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:30,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297603396] [2021-06-05 14:20:30,215 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 [2021-06-05 14:20:30,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:20:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:30,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,313 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 [2021-06-05 14:20:30,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:30,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,317 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 [2021-06-05 14:20:30,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,322 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 15 treesize of output 11 [2021-06-05 14:20:30,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:20:30,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:30,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:30,379 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:185, output treesize:175 [2021-06-05 14:20:30,802 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_734, array_4], 21=[array_2, v_prenex_733]} [2021-06-05 14:20:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,809 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 15 treesize of output 11 [2021-06-05 14:20:30,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,815 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 15 treesize of output 11 [2021-06-05 14:20:30,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,822 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 25 treesize of output 19 [2021-06-05 14:20:30,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,829 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 19 treesize of output 15 [2021-06-05 14:20:30,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,836 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 17 treesize of output 13 [2021-06-05 14:20:30,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:30,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:30,843 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 28 treesize of output 22 [2021-06-05 14:20:30,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,014 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2021-06-05 14:20:31,015 INFO L628 ElimStorePlain]: treesize reduction 117, result has 70.2 percent of original size [2021-06-05 14:20:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,021 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 27 treesize of output 21 [2021-06-05 14:20:31,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:31,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:31,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:31,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,034 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 38 treesize of output 30 [2021-06-05 14:20:31,035 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:31,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,040 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 29 treesize of output 23 [2021-06-05 14:20:31,041 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:31,144 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 14:20:31,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,150 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 [2021-06-05 14:20:31,151 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,157 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 10 treesize of output 5 [2021-06-05 14:20:31,157 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,173 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 24 treesize of output 9 [2021-06-05 14:20:31,173 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,179 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 46 treesize of output 15 [2021-06-05 14:20:31,179 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,198 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 [2021-06-05 14:20:31,198 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:31,204 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,218 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 12 treesize of output 5 [2021-06-05 14:20:31,219 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,224 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 24 treesize of output 9 [2021-06-05 14:20:31,224 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,337 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 9 treesize of output 3 [2021-06-05 14:20:31,337 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,342 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 11 treesize of output 3 [2021-06-05 14:20:31,343 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:31,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:31,348 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:31,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:31,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-05 14:20:31,442 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 18 variables, input treesize:435, output treesize:112 [2021-06-05 14:20:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:31,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297603396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:31,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:31,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:20:31,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835005846] [2021-06-05 14:20:31,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:31,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:31,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:31,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:31,496 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) [2021-06-05 14:20:31,888 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-05 14:20:32,189 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 106 [2021-06-05 14:20:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:32,327 INFO L93 Difference]: Finished difference Result 219 states and 638 transitions. [2021-06-05 14:20:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:32,328 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 [2021-06-05 14:20:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:32,328 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:20:32,328 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 14:20:32,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1041.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 14:20:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2021-06-05 14:20:32,330 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) [2021-06-05 14:20:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-05 14:20:32,331 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-05 14:20:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:32,331 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-05 14:20:32,331 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) [2021-06-05 14:20:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-05 14:20:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:32,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:32,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:32,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:32,532 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1954391240, now seen corresponding path program 64 times [2021-06-05 14:20:32,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:32,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687223741] [2021-06-05 14:20:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:32,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687223741] [2021-06-05 14:20:32,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687223741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:32,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404606299] [2021-06-05 14:20:32,782 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 [2021-06-05 14:20:32,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:20:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:32,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,923 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 25 treesize of output 19 [2021-06-05 14:20:32,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,937 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 25 treesize of output 19 [2021-06-05 14:20:32,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,941 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 35 treesize of output 27 [2021-06-05 14:20:32,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:32,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:32,946 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 [2021-06-05 14:20:32,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:33,027 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. [2021-06-05 14:20:33,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:187, output treesize:247 [2021-06-05 14:20:33,224 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-05 14:20:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:33,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,236 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 28 treesize of output 22 [2021-06-05 14:20:33,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:33,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-06-05 14:20:33,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,255 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 30 treesize of output 24 [2021-06-05 14:20:33,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,262 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 25 treesize of output 19 [2021-06-05 14:20:33,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,269 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 48 treesize of output 38 [2021-06-05 14:20:33,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:20:33,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,282 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 [2021-06-05 14:20:33,282 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:33,288 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:20:33,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:33,300 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,307 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 30 treesize of output 24 [2021-06-05 14:20:33,308 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:33,315 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,590 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 14:20:33,590 INFO L628 ElimStorePlain]: treesize reduction 209, result has 62.5 percent of original size [2021-06-05 14:20:33,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,595 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 12 treesize of output 5 [2021-06-05 14:20:33,595 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,600 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 44 treesize of output 19 [2021-06-05 14:20:33,601 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,605 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 21 treesize of output 7 [2021-06-05 14:20:33,606 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,610 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 [2021-06-05 14:20:33,611 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,615 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 12 treesize of output 5 [2021-06-05 14:20:33,616 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,621 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 21 treesize of output 7 [2021-06-05 14:20:33,622 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,627 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 11 treesize of output 3 [2021-06-05 14:20:33,627 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:33,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,639 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 [2021-06-05 14:20:33,640 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:33,643 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 20 treesize of output 9 [2021-06-05 14:20:33,644 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:33,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:33,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:33,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:33,755 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:705, output treesize:139 [2021-06-05 14:20:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:33,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404606299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:33,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:33,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:20:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930429529] [2021-06-05 14:20:33,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:33,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:33,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:33,903 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) [2021-06-05 14:20:34,198 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-05 14:20:34,388 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:20:34,590 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 14:20:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:34,623 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-06-05 14:20:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:34,623 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 [2021-06-05 14:20:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:34,624 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:20:34,624 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 14:20:34,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 951.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:20:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 14:20:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2021-06-05 14:20:34,626 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) [2021-06-05 14:20:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-05 14:20:34,626 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-05 14:20:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:34,627 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-05 14:20:34,627 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) [2021-06-05 14:20:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-05 14:20:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:34,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:34,627 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:34,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2701 [2021-06-05 14:20:34,828 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:34,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1798257188, now seen corresponding path program 65 times [2021-06-05 14:20:34,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:34,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855858423] [2021-06-05 14:20:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:35,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:35,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855858423] [2021-06-05 14:20:35,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855858423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:35,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694013783] [2021-06-05 14:20:35,005 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 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 [2021-06-05 14:20:35,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:35,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:35,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:35,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:35,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,118 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 [2021-06-05 14:20:35,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,121 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 [2021-06-05 14:20:35,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:35,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:35,167 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-05 14:20:35,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,405 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 27 treesize of output 21 [2021-06-05 14:20:35,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,412 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 17 treesize of output 13 [2021-06-05 14:20:35,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,633 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-06-05 14:20:35,633 INFO L628 ElimStorePlain]: treesize reduction 94, result has 77.0 percent of original size [2021-06-05 14:20:35,637 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 7 treesize of output 5 [2021-06-05 14:20:35,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:35,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-05 14:20:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,741 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 29 treesize of output 23 [2021-06-05 14:20:35,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,748 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 19 treesize of output 15 [2021-06-05 14:20:35,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,753 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 38 treesize of output 30 [2021-06-05 14:20:35,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:35,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,758 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 28 treesize of output 22 [2021-06-05 14:20:35,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,861 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 14:20:35,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,866 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 24 treesize of output 9 [2021-06-05 14:20:35,867 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,872 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 12 treesize of output 5 [2021-06-05 14:20:35,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:35,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,885 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 21 treesize of output 7 [2021-06-05 14:20:35,886 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,891 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 11 treesize of output 3 [2021-06-05 14:20:35,891 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:20:35,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:35,901 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 46 treesize of output 15 [2021-06-05 14:20:35,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:35,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,014 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 14:20:36,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:36,019 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:36,122 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 14:20:36,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,127 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 [2021-06-05 14:20:36,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:36,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,132 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 10 treesize of output 5 [2021-06-05 14:20:36,132 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:36,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,240 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 14:20:36,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,245 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 [2021-06-05 14:20:36,246 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,250 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 [2021-06-05 14:20:36,251 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:36,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:36,262 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 9 treesize of output 3 [2021-06-05 14:20:36,263 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:36,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:36,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:36,364 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:404, output treesize:170 [2021-06-05 14:20:36,514 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:20:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:36,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694013783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:36,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:36,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:20:36,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418232365] [2021-06-05 14:20:36,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:36,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:36,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:36,576 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) [2021-06-05 14:20:36,880 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 14:20:37,213 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:20:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:37,272 INFO L93 Difference]: Finished difference Result 234 states and 676 transitions. [2021-06-05 14:20:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:37,272 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 [2021-06-05 14:20:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:37,273 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:20:37,273 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:20:37,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:20:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2021-06-05 14:20:37,275 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) [2021-06-05 14:20:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-06-05 14:20:37,276 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-06-05 14:20:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:37,276 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-06-05 14:20:37,276 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) [2021-06-05 14:20:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-06-05 14:20:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:37,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:37,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:37,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:37,477 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash 881305860, now seen corresponding path program 66 times [2021-06-05 14:20:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:37,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502349194] [2021-06-05 14:20:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:37,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:37,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502349194] [2021-06-05 14:20:37,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502349194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279237803] [2021-06-05 14:20:37,632 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 [2021-06-05 14:20:37,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:20:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:37,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:37,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:37,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,768 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 17 treesize of output 13 [2021-06-05 14:20:37,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,772 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 [2021-06-05 14:20:37,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:37,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:37,817 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. [2021-06-05 14:20:37,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-06-05 14:20:37,960 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-06-05 14:20:37,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,966 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 38 treesize of output 30 [2021-06-05 14:20:37,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:37,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,972 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 35 treesize of output 27 [2021-06-05 14:20:37,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:37,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,979 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 17 treesize of output 13 [2021-06-05 14:20:37,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,985 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 [2021-06-05 14:20:37,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:37,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:37,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:37,998 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 19 treesize of output 15 [2021-06-05 14:20:37,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,005 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 28 treesize of output 22 [2021-06-05 14:20:38,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:38,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:38,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:20:38,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:38,023 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 25 treesize of output 19 [2021-06-05 14:20:38,024 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,283 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2021-06-05 14:20:38,283 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-06-05 14:20:38,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,288 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 20 treesize of output 9 [2021-06-05 14:20:38,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,294 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 20 treesize of output 9 [2021-06-05 14:20:38,294 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:38,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,307 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 9 treesize of output 3 [2021-06-05 14:20:38,308 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,313 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 [2021-06-05 14:20:38,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,318 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 24 treesize of output 9 [2021-06-05 14:20:38,319 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,324 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 46 treesize of output 15 [2021-06-05 14:20:38,324 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:38,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,342 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 11 treesize of output 3 [2021-06-05 14:20:38,342 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:38,348 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,360 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 24 treesize of output 9 [2021-06-05 14:20:38,361 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:38,366 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:38,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:38,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:38,378 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:38,496 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 14:20:38,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:38,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:38,500 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:457, output treesize:213 [2021-06-05 14:20:38,638 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:20:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:38,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279237803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:38,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:38,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:20:38,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377444124] [2021-06-05 14:20:38,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:20:38,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:38,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:20:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:20:38,699 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) [2021-06-05 14:20:39,152 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 14:20:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:39,223 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-06-05 14:20:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:20:39,223 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 [2021-06-05 14:20:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:39,224 INFO L225 Difference]: With dead ends: 221 [2021-06-05 14:20:39,224 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:20:39,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:20:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:20:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2021-06-05 14:20:39,226 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) [2021-06-05 14:20:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-05 14:20:39,226 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-05 14:20:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:39,226 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-05 14:20:39,226 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) [2021-06-05 14:20:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-05 14:20:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:39,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:39,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:39,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-06-05 14:20:39,428 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1017508532, now seen corresponding path program 67 times [2021-06-05 14:20:39,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:39,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286372350] [2021-06-05 14:20:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:39,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:39,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286372350] [2021-06-05 14:20:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286372350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:39,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508634296] [2021-06-05 14:20:39,713 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 [2021-06-05 14:20:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:39,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:39,804 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 15 treesize of output 11 [2021-06-05 14:20:39,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:39,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:39,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:39,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:20:39,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:39,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:39,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-06-05 14:20:39,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,937 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 27 treesize of output 21 [2021-06-05 14:20:39,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:39,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,941 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 [2021-06-05 14:20:39,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:39,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,950 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 35 treesize of output 27 [2021-06-05 14:20:39,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:39,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,955 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 37 treesize of output 29 [2021-06-05 14:20:39,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:39,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,960 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 [2021-06-05 14:20:39,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,965 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 25 treesize of output 19 [2021-06-05 14:20:39,965 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,970 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 18 treesize of output 14 [2021-06-05 14:20:39,970 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:39,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:39,975 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:39,978 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 27 treesize of output 21 [2021-06-05 14:20:39,979 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,134 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:20:40,134 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:20:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,138 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 10 treesize of output 5 [2021-06-05 14:20:40,139 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,142 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 [2021-06-05 14:20:40,142 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,146 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 [2021-06-05 14:20:40,146 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,149 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 11 treesize of output 3 [2021-06-05 14:20:40,150 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:40,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,160 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 [2021-06-05 14:20:40,161 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,164 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 44 treesize of output 19 [2021-06-05 14:20:40,165 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,168 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 12 treesize of output 5 [2021-06-05 14:20:40,168 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:40,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:40,181 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 [2021-06-05 14:20:40,181 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,184 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 11 treesize of output 3 [2021-06-05 14:20:40,185 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:40,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:40,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:40,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:40,255 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:20:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:40,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508634296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:40,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:40,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:20:40,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465300313] [2021-06-05 14:20:40,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:40,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:40,396 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) [2021-06-05 14:20:40,733 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 14:20:41,053 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:20:41,212 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2021-06-05 14:20:41,535 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2021-06-05 14:20:41,863 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2021-06-05 14:20:42,160 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 95 [2021-06-05 14:20:42,499 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-06-05 14:20:42,846 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2021-06-05 14:20:43,180 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-05 14:20:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:43,239 INFO L93 Difference]: Finished difference Result 325 states and 931 transitions. [2021-06-05 14:20:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:20:43,239 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 [2021-06-05 14:20:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:43,240 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:20:43,240 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:20:43,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2895.4ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:20:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:20:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 202. [2021-06-05 14:20:43,242 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) [2021-06-05 14:20:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-06-05 14:20:43,243 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-06-05 14:20:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:43,243 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-06-05 14:20:43,243 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) [2021-06-05 14:20:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-06-05 14:20:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:43,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:43,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:43,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:43,444 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash -56410218, now seen corresponding path program 68 times [2021-06-05 14:20:43,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:43,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119585766] [2021-06-05 14:20:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:43,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:43,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119585766] [2021-06-05 14:20:43,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119585766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:43,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100069716] [2021-06-05 14:20:43,744 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 [2021-06-05 14:20:43,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:43,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:43,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:43,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,983 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 35 treesize of output 27 [2021-06-05 14:20:43,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:43,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:43,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:43,994 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 25 treesize of output 19 [2021-06-05 14:20:43,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,094 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. [2021-06-05 14:20:44,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:179, output treesize:235 [2021-06-05 14:20:44,471 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]} [2021-06-05 14:20:44,476 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 27 treesize of output 21 [2021-06-05 14:20:44,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:44,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,592 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-05 14:20:44,592 INFO L628 ElimStorePlain]: treesize reduction 130, result has 57.7 percent of original size [2021-06-05 14:20:44,596 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 [2021-06-05 14:20:44,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:44,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:44,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:44,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,699 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 29 treesize of output 23 [2021-06-05 14:20:44,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,751 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 [2021-06-05 14:20:44,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,803 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 24 treesize of output 9 [2021-06-05 14:20:44,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,807 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 [2021-06-05 14:20:44,808 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,858 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 [2021-06-05 14:20:44,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,862 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 21 treesize of output 7 [2021-06-05 14:20:44,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:44,919 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:44,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:44,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:44,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:44,978 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:45,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:45,021 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-06-05 14:20:45,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:45,024 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-06-05 14:20:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:45,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100069716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:45,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:45,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:20:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220126078] [2021-06-05 14:20:45,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:45,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:45,074 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) [2021-06-05 14:20:45,496 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-06-05 14:20:45,767 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 117 [2021-06-05 14:20:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:45,918 INFO L93 Difference]: Finished difference Result 277 states and 801 transitions. [2021-06-05 14:20:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:45,919 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 [2021-06-05 14:20:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:45,919 INFO L225 Difference]: With dead ends: 277 [2021-06-05 14:20:45,919 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 14:20:45,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1243.1ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:20:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 14:20:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 206. [2021-06-05 14:20:45,922 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) [2021-06-05 14:20:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 612 transitions. [2021-06-05 14:20:45,922 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 612 transitions. Word has length 17 [2021-06-05 14:20:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:45,922 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 612 transitions. [2021-06-05 14:20:45,922 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) [2021-06-05 14:20:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 612 transitions. [2021-06-05 14:20:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:45,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:45,923 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:46,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-06-05 14:20:46,123 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash -303030390, now seen corresponding path program 69 times [2021-06-05 14:20:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:46,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518062516] [2021-06-05 14:20:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:46,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518062516] [2021-06-05 14:20:46,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518062516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:46,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634124867] [2021-06-05 14:20:46,355 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 [2021-06-05 14:20:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:20:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:46,469 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 25 treesize of output 19 [2021-06-05 14:20:46,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:46,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:46,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,480 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 17 treesize of output 13 [2021-06-05 14:20:46,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:46,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:20:46,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:20:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:46,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:46,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,602 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 25 treesize of output 19 [2021-06-05 14:20:46,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:20:46,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:46,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,611 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 35 treesize of output 27 [2021-06-05 14:20:46,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,616 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 37 treesize of output 29 [2021-06-05 14:20:46,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,621 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 17 treesize of output 13 [2021-06-05 14:20:46,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,626 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 18 treesize of output 14 [2021-06-05 14:20:46,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,630 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 27 treesize of output 21 [2021-06-05 14:20:46,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,634 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 [2021-06-05 14:20:46,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,638 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 15 treesize of output 11 [2021-06-05 14:20:46,639 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,790 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:20:46,790 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:20:46,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,794 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 [2021-06-05 14:20:46,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,797 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 [2021-06-05 14:20:46,798 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:46,802 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:46,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:46,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,819 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 44 treesize of output 19 [2021-06-05 14:20:46,820 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,823 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 12 treesize of output 5 [2021-06-05 14:20:46,823 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:46,836 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:46,839 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:46,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:46,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:46,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:46,918 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:20:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:47,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634124867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:47,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:47,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 14:20:47,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291573203] [2021-06-05 14:20:47,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:20:47,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:20:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:20:47,068 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) [2021-06-05 14:20:47,454 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 14:20:47,686 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 14:20:47,917 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:20:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:47,952 INFO L93 Difference]: Finished difference Result 288 states and 834 transitions. [2021-06-05 14:20:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:47,952 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 [2021-06-05 14:20:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:47,953 INFO L225 Difference]: With dead ends: 288 [2021-06-05 14:20:47,953 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 14:20:47,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1061.9ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:20:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 14:20:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2021-06-05 14:20:47,956 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) [2021-06-05 14:20:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-06-05 14:20:47,957 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-06-05 14:20:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:47,957 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-06-05 14:20:47,957 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) [2021-06-05 14:20:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-06-05 14:20:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:47,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:47,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:48,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-06-05 14:20:48,158 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash -129782698, now seen corresponding path program 70 times [2021-06-05 14:20:48,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:48,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359435298] [2021-06-05 14:20:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:48,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359435298] [2021-06-05 14:20:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359435298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256238051] [2021-06-05 14:20:48,363 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 [2021-06-05 14:20:48,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:20:48,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:20:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:48,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:48,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,650 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 27 treesize of output 21 [2021-06-05 14:20:48,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:48,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,729 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 15 treesize of output 11 [2021-06-05 14:20:48,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:48,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:48,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:48,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:48,810 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. [2021-06-05 14:20:48,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-06-05 14:20:49,028 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-05 14:20:49,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,034 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 29 treesize of output 23 [2021-06-05 14:20:49,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:49,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,039 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 35 treesize of output 27 [2021-06-05 14:20:49,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,046 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 [2021-06-05 14:20:49,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:49,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,057 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 15 treesize of output 11 [2021-06-05 14:20:49,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,062 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 35 treesize of output 27 [2021-06-05 14:20:49,064 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:49,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,072 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 28 treesize of output 22 [2021-06-05 14:20:49,073 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,080 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 [2021-06-05 14:20:49,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:49,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,087 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 19 treesize of output 15 [2021-06-05 14:20:49,087 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,092 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 [2021-06-05 14:20:49,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,376 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-06-05 14:20:49,377 INFO L628 ElimStorePlain]: treesize reduction 288, result has 57.1 percent of original size [2021-06-05 14:20:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,382 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 20 treesize of output 9 [2021-06-05 14:20:49,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,387 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 10 treesize of output 5 [2021-06-05 14:20:49,387 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,400 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 12 treesize of output 5 [2021-06-05 14:20:49,400 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,405 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 24 treesize of output 9 [2021-06-05 14:20:49,405 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:20:49,419 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,424 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 46 treesize of output 15 [2021-06-05 14:20:49,424 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:49,441 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:49,446 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,451 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 [2021-06-05 14:20:49,451 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:49,456 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:49,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:49,569 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 14:20:49,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:49,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:49,573 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-06-05 14:20:49,726 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:20:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:49,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256238051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:49,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:49,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:20:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275240068] [2021-06-05 14:20:49,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:20:49,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:20:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:20:49,818 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) [2021-06-05 14:20:50,201 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 14:20:50,427 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2021-06-05 14:20:50,624 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 14:20:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:50,706 INFO L93 Difference]: Finished difference Result 278 states and 809 transitions. [2021-06-05 14:20:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:20:50,706 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 [2021-06-05 14:20:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:50,707 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:20:50,707 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 14:20:50,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1183.2ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:20:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 14:20:50,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 198. [2021-06-05 14:20:50,709 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) [2021-06-05 14:20:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-05 14:20:50,710 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-05 14:20:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:50,710 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-05 14:20:50,710 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) [2021-06-05 14:20:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-05 14:20:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:50,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:50,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:50,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2893 [2021-06-05 14:20:50,911 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:50,911 INFO L82 PathProgramCache]: Analyzing trace with hash -28866952, now seen corresponding path program 71 times [2021-06-05 14:20:50,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:50,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899858212] [2021-06-05 14:20:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:51,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:51,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899858212] [2021-06-05 14:20:51,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899858212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:51,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223963391] [2021-06-05 14:20:51,157 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 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 [2021-06-05 14:20:51,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:20:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,359 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 [2021-06-05 14:20:51,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:51,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:51,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,367 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 25 treesize of output 19 [2021-06-05 14:20:51,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:51,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:51,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:20:51,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:51,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:51,465 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. [2021-06-05 14:20:51,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:199, output treesize:255 [2021-06-05 14:20:51,803 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]} [2021-06-05 14:20:51,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:51,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:51,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:51,922 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 14:20:51,923 INFO L628 ElimStorePlain]: treesize reduction 164, result has 48.9 percent of original size [2021-06-05 14:20:51,926 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 [2021-06-05 14:20:51,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:51,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:51,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:20:51,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,017 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 7 treesize of output 5 [2021-06-05 14:20:52,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:20:52,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_789 vanished before elimination [2021-06-05 14:20:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:52,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:20:52,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,153 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 11 treesize of output 3 [2021-06-05 14:20:52,154 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,157 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 21 treesize of output 7 [2021-06-05 14:20:52,157 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:52,207 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 12 treesize of output 5 [2021-06-05 14:20:52,208 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:52,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:52,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_787 vanished before elimination [2021-06-05 14:20:52,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:52,243 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:317, output treesize:53 [2021-06-05 14:20:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223963391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:52,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:52,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:20:52,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780238788] [2021-06-05 14:20:52,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:20:52,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:20:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:20:52,289 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) [2021-06-05 14:20:52,721 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-06-05 14:20:53,012 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 127 [2021-06-05 14:20:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:53,163 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-06-05 14:20:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:53,163 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 [2021-06-05 14:20:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:53,164 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:20:53,164 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 14:20:53,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1177.7ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:20:53,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 14:20:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 204. [2021-06-05 14:20:53,167 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) [2021-06-05 14:20:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 606 transitions. [2021-06-05 14:20:53,167 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 606 transitions. Word has length 17 [2021-06-05 14:20:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:53,167 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 606 transitions. [2021-06-05 14:20:53,167 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) [2021-06-05 14:20:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 606 transitions. [2021-06-05 14:20:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:53,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:53,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:53,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:20:53,368 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash -275487124, now seen corresponding path program 72 times [2021-06-05 14:20:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:53,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075501211] [2021-06-05 14:20:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:53,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075501211] [2021-06-05 14:20:53,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075501211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:53,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377508278] [2021-06-05 14:20:53,596 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 [2021-06-05 14:20:53,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:20:53,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:53,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:53,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:53,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,798 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 35 treesize of output 27 [2021-06-05 14:20:53,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,804 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 [2021-06-05 14:20:53,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:53,808 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 [2021-06-05 14:20:53,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:53,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:53,881 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. [2021-06-05 14:20:53,882 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-06-05 14:20:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,056 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 [2021-06-05 14:20:54,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,061 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 [2021-06-05 14:20:54,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,328 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 14:20:54,328 INFO L628 ElimStorePlain]: treesize reduction 233, result has 62.2 percent of original size [2021-06-05 14:20:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:54,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:54,452 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 14:20:54,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:54,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,458 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 21 treesize of output 7 [2021-06-05 14:20:54,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,463 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 [2021-06-05 14:20:54,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:54,591 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 14:20:54,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:20:54,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,602 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 47 treesize of output 37 [2021-06-05 14:20:54,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,607 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 29 treesize of output 23 [2021-06-05 14:20:54,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,612 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 18 treesize of output 14 [2021-06-05 14:20:54,613 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,618 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 29 treesize of output 23 [2021-06-05 14:20:54,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:54,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,799 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 14:20:54,800 INFO L628 ElimStorePlain]: treesize reduction 22, result has 92.7 percent of original size [2021-06-05 14:20:54,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,804 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 46 treesize of output 15 [2021-06-05 14:20:54,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:20:54,810 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:20:54,815 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,820 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 10 treesize of output 5 [2021-06-05 14:20:54,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,824 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 12 treesize of output 5 [2021-06-05 14:20:54,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:54,913 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 7 treesize of output 5 [2021-06-05 14:20:54,913 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:54,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:54,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-05 14:20:54,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:54,998 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 [2021-06-05 14:20:54,999 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:55,003 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:55,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:55,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:55,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:20:55,092 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-06-05 14:20:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377508278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:55,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:55,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:20:55,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789999655] [2021-06-05 14:20:55,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:55,229 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) [2021-06-05 14:20:55,654 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-05 14:20:55,989 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 14:20:56,256 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 14:20:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:56,315 INFO L93 Difference]: Finished difference Result 296 states and 856 transitions. [2021-06-05 14:20:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:20:56,316 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 [2021-06-05 14:20:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:56,316 INFO L225 Difference]: With dead ends: 296 [2021-06-05 14:20:56,316 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 14:20:56,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1316.1ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:20:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 14:20:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 202. [2021-06-05 14:20:56,319 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) [2021-06-05 14:20:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-06-05 14:20:56,319 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-06-05 14:20:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:56,319 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-06-05 14:20:56,319 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) [2021-06-05 14:20:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-06-05 14:20:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:56,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:56,320 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:56,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-05 14:20:56,520 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash -102239432, now seen corresponding path program 73 times [2021-06-05 14:20:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:56,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522415259] [2021-06-05 14:20:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:56,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522415259] [2021-06-05 14:20:56,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522415259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423769620] [2021-06-05 14:20:56,709 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 [2021-06-05 14:20:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:20:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:56,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:56,965 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 25 treesize of output 19 [2021-06-05 14:20:56,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:56,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:56,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,029 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 25 treesize of output 19 [2021-06-05 14:20:57,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,033 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 [2021-06-05 14:20:57,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:57,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,095 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. [2021-06-05 14:20:57,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-06-05 14:20:57,262 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-05 14:20:57,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:20:57,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,272 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 35 treesize of output 27 [2021-06-05 14:20:57,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,278 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 19 treesize of output 15 [2021-06-05 14:20:57,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,284 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 29 treesize of output 23 [2021-06-05 14:20:57,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:57,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,289 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 [2021-06-05 14:20:57,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:20:57,296 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:57,302 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,307 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 38 treesize of output 30 [2021-06-05 14:20:57,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:57,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,313 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 25 treesize of output 19 [2021-06-05 14:20:57,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,319 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 35 treesize of output 27 [2021-06-05 14:20:57,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:57,609 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 14:20:57,609 INFO L628 ElimStorePlain]: treesize reduction 276, result has 58.9 percent of original size [2021-06-05 14:20:57,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,615 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 11 treesize of output 3 [2021-06-05 14:20:57,615 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,620 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 12 treesize of output 5 [2021-06-05 14:20:57,621 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,625 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 9 [2021-06-05 14:20:57,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,639 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 [2021-06-05 14:20:57,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,644 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 20 treesize of output 9 [2021-06-05 14:20:57,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,650 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 20 treesize of output 9 [2021-06-05 14:20:57,650 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,669 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 24 treesize of output 9 [2021-06-05 14:20:57,669 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,674 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 46 treesize of output 15 [2021-06-05 14:20:57,674 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:57,691 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:57,694 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 21 treesize of output 7 [2021-06-05 14:20:57,695 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:57,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,808 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 14:20:57,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:57,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:20:57,812 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-06-05 14:20:57,968 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:20:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:58,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423769620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:58,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:58,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:20:58,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858451802] [2021-06-05 14:20:58,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:20:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:58,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:20:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:20:58,076 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) [2021-06-05 14:20:58,461 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-06-05 14:20:58,739 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-06-05 14:20:58,990 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 14:20:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:59,072 INFO L93 Difference]: Finished difference Result 286 states and 831 transitions. [2021-06-05 14:20:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:20:59,073 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 [2021-06-05 14:20:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:59,073 INFO L225 Difference]: With dead ends: 286 [2021-06-05 14:20:59,073 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 14:20:59,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1265.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:20:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 14:20:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2021-06-05 14:20:59,076 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) [2021-06-05 14:20:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-06-05 14:20:59,076 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-06-05 14:20:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:59,076 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-06-05 14:20:59,076 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) [2021-06-05 14:20:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-06-05 14:20:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:20:59,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:59,077 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:59,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 14:20:59,277 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:20:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash -99613656, now seen corresponding path program 74 times [2021-06-05 14:20:59,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:59,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944385861] [2021-06-05 14:20:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:20:59,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944385861] [2021-06-05 14:20:59,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944385861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795463153] [2021-06-05 14:20:59,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:20:59,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:20:59,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:20:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:59,552 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 15 treesize of output 11 [2021-06-05 14:20:59,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,555 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 27 treesize of output 21 [2021-06-05 14:20:59,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:59,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:20:59,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:59,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:20:59,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:79 [2021-06-05 14:20:59,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,696 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 19 treesize of output 15 [2021-06-05 14:20:59,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,701 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 [2021-06-05 14:20:59,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,707 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 28 treesize of output 22 [2021-06-05 14:20:59,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:20:59,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,716 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 38 treesize of output 30 [2021-06-05 14:20:59,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,723 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 [2021-06-05 14:20:59,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,728 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 29 treesize of output 23 [2021-06-05 14:20:59,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:59,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,734 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 27 treesize of output 21 [2021-06-05 14:20:59,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:20:59,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,739 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 35 treesize of output 27 [2021-06-05 14:20:59,741 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-05 14:20:59,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:20:59,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,934 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 14:20:59,934 INFO L628 ElimStorePlain]: treesize reduction 170, result has 59.5 percent of original size [2021-06-05 14:20:59,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,939 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 [2021-06-05 14:20:59,939 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:20:59,944 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,958 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 11 treesize of output 3 [2021-06-05 14:20:59,958 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,962 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 12 treesize of output 5 [2021-06-05 14:20:59,963 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,967 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 46 treesize of output 15 [2021-06-05 14:20:59,968 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:20:59,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,984 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 20 treesize of output 9 [2021-06-05 14:20:59,985 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:20:59,989 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 20 treesize of output 9 [2021-06-05 14:20:59,990 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:20:59,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:00,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:00,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:00,004 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:00,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:00,008 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:00,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:00,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:00,082 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:347, output treesize:139 [2021-06-05 14:21:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:00,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795463153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:00,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:00,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:00,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737509948] [2021-06-05 14:21:00,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:00,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:00,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:00,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:00,233 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) [2021-06-05 14:21:01,034 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 14:21:01,460 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 14:21:01,860 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 14:21:02,256 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2021-06-05 14:21:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:02,311 INFO L93 Difference]: Finished difference Result 328 states and 938 transitions. [2021-06-05 14:21:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:21:02,312 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 [2021-06-05 14:21:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:02,312 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:21:02,313 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 14:21:02,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2135.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 14:21:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 204. [2021-06-05 14:21:02,316 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) [2021-06-05 14:21:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-06-05 14:21:02,317 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-06-05 14:21:02,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:02,317 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-06-05 14:21:02,317 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) [2021-06-05 14:21:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-06-05 14:21:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:02,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:02,317 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:02,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 14:21:02,533 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 61528026, now seen corresponding path program 75 times [2021-06-05 14:21:02,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:02,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705503403] [2021-06-05 14:21:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705503403] [2021-06-05 14:21:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705503403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800457407] [2021-06-05 14:21:02,695 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 [2021-06-05 14:21:02,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:21:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:02,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:02,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:02,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:02,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:02,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:02,981 INFO L628 ElimStorePlain]: treesize reduction 16, result has 88.8 percent of original size [2021-06-05 14:21:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:02,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:02,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:02,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:21:02,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,026 INFO L628 ElimStorePlain]: treesize reduction 45, result has 59.8 percent of original size [2021-06-05 14:21:03,028 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. [2021-06-05 14:21:03,028 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:164, output treesize:67 [2021-06-05 14:21:03,114 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_811, v_prenex_813, array_0], 1=[v_prenex_812, v_prenex_814, array_4]} [2021-06-05 14:21:03,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:03,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,122 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 18 treesize of output 14 [2021-06-05 14:21:03,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,189 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-06-05 14:21:03,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:21:03,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,195 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 17 treesize of output 13 [2021-06-05 14:21:03,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,226 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 27 treesize of output 21 [2021-06-05 14:21:03,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:03,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:21:03,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,265 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 12 treesize of output 5 [2021-06-05 14:21:03,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,298 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 [2021-06-05 14:21:03,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,302 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 9 treesize of output 3 [2021-06-05 14:21:03,302 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,334 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 11 treesize of output 3 [2021-06-05 14:21:03,335 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:03,337 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 [2021-06-05 14:21:03,338 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:03,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:03,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:21:03,375 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-05 14:21:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:03,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800457407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:03,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:03,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:21:03,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786603647] [2021-06-05 14:21:03,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:21:03,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:21:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:21:03,414 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) [2021-06-05 14:21:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:03,838 INFO L93 Difference]: Finished difference Result 245 states and 716 transitions. [2021-06-05 14:21:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:21:03,838 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 [2021-06-05 14:21:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:03,839 INFO L225 Difference]: With dead ends: 245 [2021-06-05 14:21:03,839 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 14:21:03,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:21:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 14:21:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 209. [2021-06-05 14:21:03,841 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) [2021-06-05 14:21:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-05 14:21:03,842 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-05 14:21:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:03,842 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-05 14:21:03,842 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) [2021-06-05 14:21:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-05 14:21:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:03,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:03,842 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 14:21:04,043 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1542765896, now seen corresponding path program 76 times [2021-06-05 14:21:04,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:04,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536712246] [2021-06-05 14:21:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:04,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:04,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536712246] [2021-06-05 14:21:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536712246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:04,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932196748] [2021-06-05 14:21:04,269 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 [2021-06-05 14:21:04,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:04,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:04,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,373 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 35 treesize of output 27 [2021-06-05 14:21:04,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:04,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:04,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,394 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 [2021-06-05 14:21:04,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:04,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:04,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-06-05 14:21:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,618 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 [2021-06-05 14:21:04,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:04,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:04,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,629 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 25 treesize of output 19 [2021-06-05 14:21:04,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,634 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 30 treesize of output 24 [2021-06-05 14:21:04,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,640 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 28 treesize of output 22 [2021-06-05 14:21:04,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 14:21:04,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:04,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:04,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,662 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 46 treesize of output 36 [2021-06-05 14:21:04,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:04,667 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,672 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 [2021-06-05 14:21:04,673 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:04,677 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,681 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 27 treesize of output 21 [2021-06-05 14:21:04,682 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:21:04,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,887 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 14:21:04,887 INFO L628 ElimStorePlain]: treesize reduction 157, result has 65.0 percent of original size [2021-06-05 14:21:04,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,892 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 10 treesize of output 5 [2021-06-05 14:21:04,892 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:04,897 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:04,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,907 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 12 treesize of output 5 [2021-06-05 14:21:04,908 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:04,912 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,916 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 21 treesize of output 7 [2021-06-05 14:21:04,916 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:04,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,928 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 12 treesize of output 5 [2021-06-05 14:21:04,929 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,933 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 11 treesize of output 3 [2021-06-05 14:21:04,933 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:04,938 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:04,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:04,941 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 44 treesize of output 19 [2021-06-05 14:21:04,942 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:05,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:05,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:05,022 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-06-05 14:21:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:05,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932196748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:05,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:05,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 14:21:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207472683] [2021-06-05 14:21:05,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:21:05,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:05,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:21:05,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:21:05,179 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) [2021-06-05 14:21:05,563 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 14:21:05,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:05,740 INFO L93 Difference]: Finished difference Result 249 states and 718 transitions. [2021-06-05 14:21:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:05,740 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 [2021-06-05 14:21:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:05,741 INFO L225 Difference]: With dead ends: 249 [2021-06-05 14:21:05,741 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 14:21:05,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:21:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 14:21:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 212. [2021-06-05 14:21:05,744 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) [2021-06-05 14:21:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-06-05 14:21:05,745 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 17 [2021-06-05 14:21:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:05,745 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-06-05 14:21:05,745 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) [2021-06-05 14:21:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-06-05 14:21:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:05,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:05,746 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-05 14:21:05,969 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -128210120, now seen corresponding path program 77 times [2021-06-05 14:21:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977458928] [2021-06-05 14:21:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:06,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977458928] [2021-06-05 14:21:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977458928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:06,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401872756] [2021-06-05 14:21:06,170 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 [2021-06-05 14:21:06,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:06,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:06,345 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 15 treesize of output 11 [2021-06-05 14:21:06,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:06,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,351 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 27 treesize of output 21 [2021-06-05 14:21:06,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:06,354 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 25 treesize of output 19 [2021-06-05 14:21:06,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,357 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 17 treesize of output 13 [2021-06-05 14:21:06,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:06,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,417 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-05 14:21:06,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:06,418 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-05 14:21:06,491 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 27 treesize of output 21 [2021-06-05 14:21:06,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:06,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:06,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,536 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-05 14:21:06,537 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-06-05 14:21:06,537 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:21:06,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:06,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,542 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 19 treesize of output 15 [2021-06-05 14:21:06,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:06,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:06,564 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:21:06,564 INFO L518 ElimStorePlain]: Eliminatee v_prenex_818 vanished before elimination [2021-06-05 14:21:06,564 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:06,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:06,565 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:21:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401872756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:06,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414647593] [2021-06-05 14:21:06,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:06,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:06,596 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) [2021-06-05 14:21:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:07,297 INFO L93 Difference]: Finished difference Result 249 states and 710 transitions. [2021-06-05 14:21:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:21:07,297 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 [2021-06-05 14:21:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:07,298 INFO L225 Difference]: With dead ends: 249 [2021-06-05 14:21:07,298 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 14:21:07,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 14:21:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-06-05 14:21:07,300 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) [2021-06-05 14:21:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-06-05 14:21:07,301 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-06-05 14:21:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:07,301 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-06-05 14:21:07,301 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) [2021-06-05 14:21:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-06-05 14:21:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:07,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:07,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:07,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:07,502 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2091682306, now seen corresponding path program 78 times [2021-06-05 14:21:07,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:07,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705895735] [2021-06-05 14:21:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:07,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:07,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705895735] [2021-06-05 14:21:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705895735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:07,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225897588] [2021-06-05 14:21:07,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:21:07,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:21:07,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:07,958 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 25 treesize of output 19 [2021-06-05 14:21:07,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:07,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:07,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:07,972 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 17 treesize of output 13 [2021-06-05 14:21:07,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:08,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:08,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:21:08,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,126 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 27 treesize of output 21 [2021-06-05 14:21:08,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:08,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,130 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 25 treesize of output 19 [2021-06-05 14:21:08,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,134 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 28 treesize of output 22 [2021-06-05 14:21:08,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:08,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,139 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 15 treesize of output 11 [2021-06-05 14:21:08,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,143 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 [2021-06-05 14:21:08,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:08,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,148 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 [2021-06-05 14:21:08,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:08,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:08,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,157 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 25 treesize of output 19 [2021-06-05 14:21:08,158 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,161 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 [2021-06-05 14:21:08,162 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,165 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 18 treesize of output 14 [2021-06-05 14:21:08,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,324 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:21:08,325 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-05 14:21:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,328 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 [2021-06-05 14:21:08,329 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:08,333 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,336 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 7 [2021-06-05 14:21:08,337 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,340 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 11 treesize of output 3 [2021-06-05 14:21:08,340 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:08,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,350 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 12 treesize of output 5 [2021-06-05 14:21:08,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:21:08,354 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,357 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 12 treesize of output 5 [2021-06-05 14:21:08,358 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:08,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:08,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:08,371 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:08,374 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:08,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:08,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:08,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:08,442 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:21:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225897588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:08,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:08,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99343395] [2021-06-05 14:21:08,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:08,578 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) [2021-06-05 14:21:09,053 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:21:09,249 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:21:09,539 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:21:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:09,595 INFO L93 Difference]: Finished difference Result 250 states and 726 transitions. [2021-06-05 14:21:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:21:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:21:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:09,596 INFO L225 Difference]: With dead ends: 250 [2021-06-05 14:21:09,596 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 14:21:09,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1202.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 14:21:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2021-06-05 14:21:09,598 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) [2021-06-05 14:21:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 616 transitions. [2021-06-05 14:21:09,598 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 616 transitions. Word has length 17 [2021-06-05 14:21:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:09,599 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 616 transitions. [2021-06-05 14:21:09,599 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) [2021-06-05 14:21:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 616 transitions. [2021-06-05 14:21:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:09,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:09,599 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:09,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-05 14:21:09,800 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:09,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1276876152, now seen corresponding path program 79 times [2021-06-05 14:21:09,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:09,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988432982] [2021-06-05 14:21:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:10,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988432982] [2021-06-05 14:21:10,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988432982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137024947] [2021-06-05 14:21:10,095 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 [2021-06-05 14:21:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:10,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:21:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:10,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,307 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 [2021-06-05 14:21:10,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:10,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,372 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 [2021-06-05 14:21:10,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:10,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,376 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 [2021-06-05 14:21:10,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:10,440 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. [2021-06-05 14:21:10,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:190, output treesize:180 [2021-06-05 14:21:10,614 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-05 14:21:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,618 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 35 treesize of output 27 [2021-06-05 14:21:10,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,625 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 19 treesize of output 15 [2021-06-05 14:21:10,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,630 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 [2021-06-05 14:21:10,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,636 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 28 treesize of output 22 [2021-06-05 14:21:10,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,642 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 35 treesize of output 27 [2021-06-05 14:21:10,643 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:10,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,648 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 38 treesize of output 30 [2021-06-05 14:21:10,649 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:10,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:10,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,661 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 [2021-06-05 14:21:10,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,667 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 29 treesize of output 23 [2021-06-05 14:21:10,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:10,674 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 15 treesize of output 11 [2021-06-05 14:21:10,674 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,955 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 14:21:10,955 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-06-05 14:21:10,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,960 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 24 treesize of output 9 [2021-06-05 14:21:10,961 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:10,966 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,979 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 [2021-06-05 14:21:10,980 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,984 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 21 treesize of output 7 [2021-06-05 14:21:10,985 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:10,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:10,997 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,002 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 [2021-06-05 14:21:11,003 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,015 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 21 treesize of output 7 [2021-06-05 14:21:11,015 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:11,020 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,025 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 46 treesize of output 15 [2021-06-05 14:21:11,025 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:21:11,030 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:11,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:11,146 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 14:21:11,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:11,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:11,151 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:509, output treesize:208 [2021-06-05 14:21:11,305 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 14:21:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:11,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137024947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:11,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:11,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:21:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224765939] [2021-06-05 14:21:11,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:21:11,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:21:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:21:11,402 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) [2021-06-05 14:21:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:11,915 INFO L93 Difference]: Finished difference Result 236 states and 693 transitions. [2021-06-05 14:21:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:21:11,915 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 [2021-06-05 14:21:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:11,916 INFO L225 Difference]: With dead ends: 236 [2021-06-05 14:21:11,916 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 14:21:11,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:21:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 14:21:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 206. [2021-06-05 14:21:11,918 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) [2021-06-05 14:21:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-06-05 14:21:11,918 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-06-05 14:21:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:11,918 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-06-05 14:21:11,918 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) [2021-06-05 14:21:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-06-05 14:21:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:11,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:11,919 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:12,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:12,120 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1996192008, now seen corresponding path program 80 times [2021-06-05 14:21:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:12,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322746707] [2021-06-05 14:21:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:12,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322746707] [2021-06-05 14:21:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322746707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219898601] [2021-06-05 14:21:12,369 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 [2021-06-05 14:21:12,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:12,485 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 35 treesize of output 27 [2021-06-05 14:21:12,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:12,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:12,491 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 15 treesize of output 11 [2021-06-05 14:21:12,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:12,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:12,495 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 [2021-06-05 14:21:12,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:12,498 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 [2021-06-05 14:21:12,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:12,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:12,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:12,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:21:12,666 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]} [2021-06-05 14:21:12,670 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 27 treesize of output 21 [2021-06-05 14:21:12,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:12,675 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 25 treesize of output 19 [2021-06-05 14:21:12,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:12,871 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:21:12,871 INFO L628 ElimStorePlain]: treesize reduction 197, result has 62.3 percent of original size [2021-06-05 14:21:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:12,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:12,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:12,969 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 [2021-06-05 14:21:12,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:13,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:13,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:21:13,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,075 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 48 treesize of output 38 [2021-06-05 14:21:13,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,079 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 [2021-06-05 14:21:13,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,083 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 28 treesize of output 22 [2021-06-05 14:21:13,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,218 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 14:21:13,219 INFO L628 ElimStorePlain]: treesize reduction 49, result has 82.9 percent of original size [2021-06-05 14:21:13,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:13,223 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:21:13,226 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,300 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 11 treesize of output 3 [2021-06-05 14:21:13,301 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,304 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 [2021-06-05 14:21:13,304 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,374 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,378 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 21 treesize of output 7 [2021-06-05 14:21:13,378 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,381 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 12 treesize of output 5 [2021-06-05 14:21:13,382 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:13,386 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:13,388 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 44 treesize of output 19 [2021-06-05 14:21:13,389 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:13,392 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:13,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:13,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:13,454 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:21:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219898601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:13,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:13,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026732234] [2021-06-05 14:21:13,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:13,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:13,598 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) [2021-06-05 14:21:14,015 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 14:21:14,242 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 14:21:14,437 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 14:21:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:14,642 INFO L93 Difference]: Finished difference Result 262 states and 749 transitions. [2021-06-05 14:21:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:21:14,642 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 [2021-06-05 14:21:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:14,643 INFO L225 Difference]: With dead ends: 262 [2021-06-05 14:21:14,643 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 14:21:14,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1188.5ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:21:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 14:21:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-05 14:21:14,645 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) [2021-06-05 14:21:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-05 14:21:14,646 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-05 14:21:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:14,646 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-05 14:21:14,646 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) [2021-06-05 14:21:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-05 14:21:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:14,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:14,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:14,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-06-05 14:21:14,847 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608496, now seen corresponding path program 81 times [2021-06-05 14:21:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:14,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895555405] [2021-06-05 14:21:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:14,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895555405] [2021-06-05 14:21:14,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895555405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164979117] [2021-06-05 14:21:14,995 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 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 [2021-06-05 14:21:15,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:21:15,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:21:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:15,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:15,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:15,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:15,179 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 [2021-06-05 14:21:15,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:15,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:15,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:15,240 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. [2021-06-05 14:21:15,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-06-05 14:21:15,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,424 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 [2021-06-05 14:21:15,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,432 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 28 treesize of output 22 [2021-06-05 14:21:15,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:15,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,448 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 38 treesize of output 30 [2021-06-05 14:21:15,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:15,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,456 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 [2021-06-05 14:21:15,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,464 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 35 treesize of output 27 [2021-06-05 14:21:15,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:15,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,472 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 35 treesize of output 27 [2021-06-05 14:21:15,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:15,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,481 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 19 treesize of output 15 [2021-06-05 14:21:15,482 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,489 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 25 treesize of output 19 [2021-06-05 14:21:15,490 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,497 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 29 treesize of output 23 [2021-06-05 14:21:15,499 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:15,857 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2021-06-05 14:21:15,858 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-06-05 14:21:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,863 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 [2021-06-05 14:21:15,864 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,868 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 20 treesize of output 9 [2021-06-05 14:21:15,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:15,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,881 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 21 treesize of output 7 [2021-06-05 14:21:15,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,886 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 21 treesize of output 7 [2021-06-05 14:21:15,886 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:15,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,899 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 21 treesize of output 7 [2021-06-05 14:21:15,900 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,904 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 11 treesize of output 3 [2021-06-05 14:21:15,905 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,909 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 24 treesize of output 9 [2021-06-05 14:21:15,910 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,914 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 46 treesize of output 15 [2021-06-05 14:21:15,915 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:15,932 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:15,935 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 24 treesize of output 9 [2021-06-05 14:21:15,936 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:15,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:16,050 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 14:21:16,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:16,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:16,055 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-06-05 14:21:16,201 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:21:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:16,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164979117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:16,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:16,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:21:16,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988717382] [2021-06-05 14:21:16,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:21:16,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:16,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:21:16,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:21:16,289 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) [2021-06-05 14:21:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:16,696 INFO L93 Difference]: Finished difference Result 237 states and 696 transitions. [2021-06-05 14:21:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:21:16,696 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 [2021-06-05 14:21:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:16,697 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:21:16,697 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 14:21:16,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:16,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 14:21:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2021-06-05 14:21:16,699 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) [2021-06-05 14:21:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-05 14:21:16,699 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-05 14:21:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:16,700 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-05 14:21:16,700 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) [2021-06-05 14:21:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-05 14:21:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:16,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:16,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:16,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:16,901 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:16,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash -573434050, now seen corresponding path program 82 times [2021-06-05 14:21:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:16,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442446448] [2021-06-05 14:21:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:17,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442446448] [2021-06-05 14:21:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442446448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911261791] [2021-06-05 14:21:17,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:21:17,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:17,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:17,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:17,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:17,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,143 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 15 treesize of output 11 [2021-06-05 14:21:17,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,147 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 17 treesize of output 13 [2021-06-05 14:21:17,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,150 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 [2021-06-05 14:21:17,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:17,203 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:159 [2021-06-05 14:21:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,377 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 27 treesize of output 21 [2021-06-05 14:21:17,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,382 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 29 treesize of output 23 [2021-06-05 14:21:17,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:21:17,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,395 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 [2021-06-05 14:21:17,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,401 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 38 treesize of output 30 [2021-06-05 14:21:17,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:17,638 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 14:21:17,638 INFO L628 ElimStorePlain]: treesize reduction 240, result has 59.0 percent of original size [2021-06-05 14:21:17,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,643 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 11 treesize of output 3 [2021-06-05 14:21:17,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,648 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 [2021-06-05 14:21:17,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,661 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 46 treesize of output 15 [2021-06-05 14:21:17,661 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,666 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 12 treesize of output 5 [2021-06-05 14:21:17,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,681 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 20 treesize of output 9 [2021-06-05 14:21:17,681 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,685 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 20 treesize of output 9 [2021-06-05 14:21:17,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,697 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 [2021-06-05 14:21:17,698 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,801 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 28 treesize of output 22 [2021-06-05 14:21:17,802 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,806 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 7 treesize of output 5 [2021-06-05 14:21:17,807 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:21:17,811 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,906 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 11 treesize of output 3 [2021-06-05 14:21:17,906 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:17,910 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 [2021-06-05 14:21:17,910 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:17,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:18,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:18,000 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:454, output treesize:171 [2021-06-05 14:21:18,189 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 14:21:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:18,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911261791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:18,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:18,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:21:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444990109] [2021-06-05 14:21:18,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:18,247 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) [2021-06-05 14:21:18,591 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 14:21:18,756 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-05 14:21:18,915 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 14:21:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:18,973 INFO L93 Difference]: Finished difference Result 250 states and 724 transitions. [2021-06-05 14:21:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:18,974 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 [2021-06-05 14:21:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:18,974 INFO L225 Difference]: With dead ends: 250 [2021-06-05 14:21:18,974 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:21:18,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:21:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:21:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 205. [2021-06-05 14:21:18,976 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) [2021-06-05 14:21:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-06-05 14:21:18,977 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-06-05 14:21:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:18,977 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-06-05 14:21:18,977 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) [2021-06-05 14:21:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-06-05 14:21:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:18,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:18,977 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:19,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:19,178 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1205884026, now seen corresponding path program 83 times [2021-06-05 14:21:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:19,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097340866] [2021-06-05 14:21:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:19,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097340866] [2021-06-05 14:21:19,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097340866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:19,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823939328] [2021-06-05 14:21:19,465 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 [2021-06-05 14:21:19,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:21:19,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:19,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:19,574 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 [2021-06-05 14:21:19,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,577 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 27 treesize of output 21 [2021-06-05 14:21:19,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:19,580 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 [2021-06-05 14:21:19,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,583 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 17 treesize of output 13 [2021-06-05 14:21:19,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:19,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:19,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:21:19,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,696 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 27 treesize of output 21 [2021-06-05 14:21:19,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:19,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,700 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 25 treesize of output 19 [2021-06-05 14:21:19,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,705 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 28 treesize of output 22 [2021-06-05 14:21:19,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:19,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:19,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,713 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 35 treesize of output 27 [2021-06-05 14:21:19,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:19,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,718 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 37 treesize of output 29 [2021-06-05 14:21:19,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:19,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:19,723 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,727 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 25 treesize of output 19 [2021-06-05 14:21:19,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,737 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 [2021-06-05 14:21:19,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,741 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 18 treesize of output 14 [2021-06-05 14:21:19,741 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,887 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:21:19,888 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-05 14:21:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,891 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 10 treesize of output 5 [2021-06-05 14:21:19,892 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:19,896 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,899 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 21 treesize of output 7 [2021-06-05 14:21:19,899 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,902 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 [2021-06-05 14:21:19,903 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:19,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,913 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 [2021-06-05 14:21:19,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,917 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 44 treesize of output 19 [2021-06-05 14:21:19,917 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,920 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 12 treesize of output 5 [2021-06-05 14:21:19,921 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:19,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:19,932 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 [2021-06-05 14:21:19,933 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:19,936 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:19,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:20,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:20,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:20,008 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:21:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823939328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:20,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:20,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:20,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167377722] [2021-06-05 14:21:20,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:20,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:20,142 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) [2021-06-05 14:21:20,581 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 14:21:20,741 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 14:21:20,932 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:21:21,224 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:21:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:21,286 INFO L93 Difference]: Finished difference Result 268 states and 778 transitions. [2021-06-05 14:21:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:21:21,286 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 [2021-06-05 14:21:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:21,287 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:21:21,287 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 14:21:21,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1219.5ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:21:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 14:21:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 209. [2021-06-05 14:21:21,290 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) [2021-06-05 14:21:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-05 14:21:21,291 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-05 14:21:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:21,291 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-05 14:21:21,291 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) [2021-06-05 14:21:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-05 14:21:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:21,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:21,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:21,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-06-05 14:21:21,513 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash 391077872, now seen corresponding path program 84 times [2021-06-05 14:21:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927314697] [2021-06-05 14:21:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:21,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:21,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927314697] [2021-06-05 14:21:21,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927314697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:21,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083943211] [2021-06-05 14:21:21,768 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 [2021-06-05 14:21:21,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:21:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:21,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:21,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:21,906 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 15 treesize of output 11 [2021-06-05 14:21:21,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:21,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:21,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:21,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:21,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:21,963 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. [2021-06-05 14:21:21,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-06-05 14:21:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,151 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 35 treesize of output 27 [2021-06-05 14:21:22,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:22,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,159 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 29 treesize of output 23 [2021-06-05 14:21:22,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,166 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 27 treesize of output 21 [2021-06-05 14:21:22,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:22,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,180 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 38 treesize of output 30 [2021-06-05 14:21:22,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:22,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,194 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 17 treesize of output 13 [2021-06-05 14:21:22,195 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,200 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 19 treesize of output 15 [2021-06-05 14:21:22,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,213 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 28 treesize of output 22 [2021-06-05 14:21:22,214 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,218 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 25 treesize of output 19 [2021-06-05 14:21:22,219 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,452 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-05 14:21:22,452 INFO L628 ElimStorePlain]: treesize reduction 142, result has 71.8 percent of original size [2021-06-05 14:21:22,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,456 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 [2021-06-05 14:21:22,457 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,461 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 20 treesize of output 9 [2021-06-05 14:21:22,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,466 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 20 treesize of output 9 [2021-06-05 14:21:22,466 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,478 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 [2021-06-05 14:21:22,479 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,483 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 46 treesize of output 15 [2021-06-05 14:21:22,483 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,488 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 24 treesize of output 9 [2021-06-05 14:21:22,488 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:22,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,504 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 11 treesize of output 3 [2021-06-05 14:21:22,505 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,509 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 21 treesize of output 7 [2021-06-05 14:21:22,510 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:22,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,521 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 [2021-06-05 14:21:22,522 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,526 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 24 treesize of output 9 [2021-06-05 14:21:22,527 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:22,530 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 12 treesize of output 5 [2021-06-05 14:21:22,531 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:22,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:22,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:22,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:22,638 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:407, output treesize:173 [2021-06-05 14:21:22,782 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:21:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083943211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:22,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:22,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:21:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960795371] [2021-06-05 14:21:22,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:22,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:22,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:22,842 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) [2021-06-05 14:21:23,279 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:21:23,472 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 14:21:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:23,526 INFO L93 Difference]: Finished difference Result 253 states and 742 transitions. [2021-06-05 14:21:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:23,526 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 [2021-06-05 14:21:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:23,528 INFO L225 Difference]: With dead ends: 253 [2021-06-05 14:21:23,528 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 14:21:23,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 967.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:21:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 14:21:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-05 14:21:23,530 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) [2021-06-05 14:21:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-05 14:21:23,531 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-05 14:21:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:23,531 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-05 14:21:23,531 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) [2021-06-05 14:21:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-05 14:21:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:23,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:23,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:23,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:23,753 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:23,754 INFO L82 PathProgramCache]: Analyzing trace with hash 981448970, now seen corresponding path program 85 times [2021-06-05 14:21:23,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:23,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464915080] [2021-06-05 14:21:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:23,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464915080] [2021-06-05 14:21:23,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464915080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977804824] [2021-06-05 14:21:23,896 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 [2021-06-05 14:21:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,048 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 27 treesize of output 21 [2021-06-05 14:21:24,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,052 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 [2021-06-05 14:21:24,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:24,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,101 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 17 treesize of output 13 [2021-06-05 14:21:24,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,145 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. [2021-06-05 14:21:24,145 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:143, output treesize:133 [2021-06-05 14:21:24,358 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-05 14:21:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,372 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 [2021-06-05 14:21:24,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,377 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 25 treesize of output 19 [2021-06-05 14:21:24,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,381 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 15 treesize of output 11 [2021-06-05 14:21:24,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,386 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 29 treesize of output 23 [2021-06-05 14:21:24,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:24,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:24,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:24,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,402 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 19 treesize of output 15 [2021-06-05 14:21:24,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,408 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 35 treesize of output 27 [2021-06-05 14:21:24,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:24,414 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 17 treesize of output 13 [2021-06-05 14:21:24,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,616 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-06-05 14:21:24,617 INFO L628 ElimStorePlain]: treesize reduction 156, result has 63.8 percent of original size [2021-06-05 14:21:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,621 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 9 treesize of output 3 [2021-06-05 14:21:24,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,626 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 12 treesize of output 5 [2021-06-05 14:21:24,627 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:21:24,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,644 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 20 treesize of output 9 [2021-06-05 14:21:24,645 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,649 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 [2021-06-05 14:21:24,649 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,661 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 11 treesize of output 3 [2021-06-05 14:21:24,662 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:24,667 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:24,670 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 [2021-06-05 14:21:24,671 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:24,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:24,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:21:24,762 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:365, output treesize:135 [2021-06-05 14:21:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:24,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977804824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:24,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:24,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:21:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464909597] [2021-06-05 14:21:24,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:24,945 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) [2021-06-05 14:21:25,687 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-05 14:21:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:25,793 INFO L93 Difference]: Finished difference Result 293 states and 852 transitions. [2021-06-05 14:21:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:25,793 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 [2021-06-05 14:21:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:25,794 INFO L225 Difference]: With dead ends: 293 [2021-06-05 14:21:25,794 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 14:21:25,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 947.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:21:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 14:21:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 205. [2021-06-05 14:21:25,797 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) [2021-06-05 14:21:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-06-05 14:21:25,797 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-06-05 14:21:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:25,797 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-06-05 14:21:25,797 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) [2021-06-05 14:21:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-06-05 14:21:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:25,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:25,798 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:25,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:25,998 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash 527178728, now seen corresponding path program 86 times [2021-06-05 14:21:25,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:25,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253392013] [2021-06-05 14:21:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:26,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:26,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253392013] [2021-06-05 14:21:26,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253392013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:26,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297733962] [2021-06-05 14:21:26,270 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 [2021-06-05 14:21:26,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:26,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:26,403 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 35 treesize of output 27 [2021-06-05 14:21:26,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:26,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:26,408 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 15 treesize of output 11 [2021-06-05 14:21:26,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:26,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:26,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,415 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 [2021-06-05 14:21:26,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:26,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:26,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:21:26,581 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]} [2021-06-05 14:21:26,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:26,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:26,591 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 25 treesize of output 19 [2021-06-05 14:21:26,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,798 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:21:26,799 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-05 14:21:26,802 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 27 treesize of output 21 [2021-06-05 14:21:26,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:26,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:26,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:26,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:26,905 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:21:26,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:26,914 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,918 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 30 treesize of output 24 [2021-06-05 14:21:26,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:26,922 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 48 treesize of output 38 [2021-06-05 14:21:26,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,065 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:21:27,065 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.3 percent of original size [2021-06-05 14:21:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:21:27,069 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,141 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 [2021-06-05 14:21:27,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:21:27,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,220 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 11 treesize of output 3 [2021-06-05 14:21:27,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,224 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 [2021-06-05 14:21:27,224 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,296 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:27,300 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,303 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 [2021-06-05 14:21:27,304 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:27,308 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:27,310 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 44 treesize of output 19 [2021-06-05 14:21:27,311 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:27,314 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:27,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:27,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:27,376 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:21:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:27,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297733962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:27,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:27,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:27,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164555512] [2021-06-05 14:21:27,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:27,518 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) [2021-06-05 14:21:28,108 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2021-06-05 14:21:28,295 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:21:28,490 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 14:21:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:28,520 INFO L93 Difference]: Finished difference Result 262 states and 761 transitions. [2021-06-05 14:21:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:21:28,520 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 [2021-06-05 14:21:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:28,521 INFO L225 Difference]: With dead ends: 262 [2021-06-05 14:21:28,521 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 14:21:28,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1254.1ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:21:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 14:21:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-05 14:21:28,523 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) [2021-06-05 14:21:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-05 14:21:28,523 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-05 14:21:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:28,523 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-05 14:21:28,523 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) [2021-06-05 14:21:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-05 14:21:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:28,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:28,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:28,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 14:21:28,729 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 869762240, now seen corresponding path program 87 times [2021-06-05 14:21:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:28,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956979536] [2021-06-05 14:21:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:28,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:28,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956979536] [2021-06-05 14:21:28,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956979536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:28,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410759837] [2021-06-05 14:21:28,895 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 [2021-06-05 14:21:28,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:21:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:28,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:21:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:29,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,065 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 25 treesize of output 19 [2021-06-05 14:21:29,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:29,134 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 25 treesize of output 19 [2021-06-05 14:21:29,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:29,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:29,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:29,210 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. [2021-06-05 14:21:29,210 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-06-05 14:21:29,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,408 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 38 treesize of output 30 [2021-06-05 14:21:29,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:29,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:29,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,423 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 28 treesize of output 22 [2021-06-05 14:21:29,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,431 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 25 treesize of output 19 [2021-06-05 14:21:29,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:29,440 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,447 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 [2021-06-05 14:21:29,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,455 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 35 treesize of output 27 [2021-06-05 14:21:29,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:29,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,464 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 [2021-06-05 14:21:29,465 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:21:29,474 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:29,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:21:29,483 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:29,818 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2021-06-05 14:21:29,819 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-06-05 14:21:29,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,824 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 21 treesize of output 7 [2021-06-05 14:21:29,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,830 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 11 treesize of output 3 [2021-06-05 14:21:29,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,835 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 46 treesize of output 15 [2021-06-05 14:21:29,836 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,841 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 [2021-06-05 14:21:29,841 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:29,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,858 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 21 treesize of output 7 [2021-06-05 14:21:29,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,864 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 [2021-06-05 14:21:29,864 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:29,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:29,877 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,882 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 24 treesize of output 9 [2021-06-05 14:21:29,883 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:29,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:21:29,896 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:29,899 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 20 treesize of output 9 [2021-06-05 14:21:29,905 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:29,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:30,029 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 14:21:30,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:30,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:30,034 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-06-05 14:21:30,182 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:21:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:30,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410759837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:30,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:30,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:21:30,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877103483] [2021-06-05 14:21:30,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:21:30,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:21:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:21:30,272 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) [2021-06-05 14:21:30,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:30,755 INFO L93 Difference]: Finished difference Result 252 states and 741 transitions. [2021-06-05 14:21:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:30,755 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 [2021-06-05 14:21:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:30,756 INFO L225 Difference]: With dead ends: 252 [2021-06-05 14:21:30,756 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 14:21:30,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:21:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 14:21:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2021-06-05 14:21:30,759 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) [2021-06-05 14:21:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-05 14:21:30,760 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-05 14:21:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:30,760 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-05 14:21:30,760 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) [2021-06-05 14:21:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-05 14:21:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:30,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:30,761 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:30,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:30,983 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1237021880, now seen corresponding path program 88 times [2021-06-05 14:21:30,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:30,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360716764] [2021-06-05 14:21:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:31,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:31,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360716764] [2021-06-05 14:21:31,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360716764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:31,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471792171] [2021-06-05 14:21:31,137 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 [2021-06-05 14:21:31,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:31,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,235 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 [2021-06-05 14:21:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,238 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 27 treesize of output 21 [2021-06-05 14:21:31,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:31,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:31,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,245 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 25 treesize of output 19 [2021-06-05 14:21:31,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:31,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:31,280 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-06-05 14:21:31,416 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]} [2021-06-05 14:21:31,420 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 28 treesize of output 22 [2021-06-05 14:21:31,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:31,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:31,430 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 19 treesize of output 15 [2021-06-05 14:21:31,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,434 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 29 treesize of output 23 [2021-06-05 14:21:31,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:31,609 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 14:21:31,610 INFO L628 ElimStorePlain]: treesize reduction 82, result has 78.2 percent of original size [2021-06-05 14:21:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:21:31,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,753 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 14:21:31,753 INFO L628 ElimStorePlain]: treesize reduction 30, result has 89.6 percent of original size [2021-06-05 14:21:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:31,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:31,885 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 14:21:31,885 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.5 percent of original size [2021-06-05 14:21:31,888 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 27 treesize of output 21 [2021-06-05 14:21:31,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:31,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:31,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,957 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 [2021-06-05 14:21:31,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:31,961 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,965 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 12 treesize of output 5 [2021-06-05 14:21:31,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:31,968 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 44 treesize of output 19 [2021-06-05 14:21:31,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,972 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 12 treesize of output 5 [2021-06-05 14:21:31,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:31,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,042 INFO L518 ElimStorePlain]: Eliminatee v_prenex_857 vanished before elimination [2021-06-05 14:21:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:32,045 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 [2021-06-05 14:21:32,046 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:32,048 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 21 treesize of output 7 [2021-06-05 14:21:32,049 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:32,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:32,120 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 20 treesize of output 9 [2021-06-05 14:21:32,121 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:32,123 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 10 treesize of output 5 [2021-06-05 14:21:32,123 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:32,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:32,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:32,191 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-06-05 14:21:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471792171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:32,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:32,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 14:21:32,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652524735] [2021-06-05 14:21:32,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:32,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:32,344 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) [2021-06-05 14:21:32,796 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-05 14:21:33,044 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-06-05 14:21:33,317 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-06-05 14:21:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:33,349 INFO L93 Difference]: Finished difference Result 299 states and 862 transitions. [2021-06-05 14:21:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:21:33,349 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 [2021-06-05 14:21:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:33,350 INFO L225 Difference]: With dead ends: 299 [2021-06-05 14:21:33,350 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 14:21:33,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1142.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:21:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 14:21:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 207. [2021-06-05 14:21:33,353 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) [2021-06-05 14:21:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-05 14:21:33,354 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-05 14:21:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-05 14:21:33,354 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) [2021-06-05 14:21:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-05 14:21:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:33,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:33,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:33,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3449 [2021-06-05 14:21:33,577 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash -176185004, now seen corresponding path program 89 times [2021-06-05 14:21:33,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:33,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78429254] [2021-06-05 14:21:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:33,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78429254] [2021-06-05 14:21:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78429254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579008940] [2021-06-05 14:21:33,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:21:33,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:33,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:21:33,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:34,010 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 25 treesize of output 19 [2021-06-05 14:21:34,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,015 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 35 treesize of output 27 [2021-06-05 14:21:34,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:34,019 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 25 treesize of output 19 [2021-06-05 14:21:34,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,148 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 14:21:34,148 INFO L628 ElimStorePlain]: treesize reduction 32, result has 88.6 percent of original size [2021-06-05 14:21:34,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:34,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:34,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,158 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 15 treesize of output 11 [2021-06-05 14:21:34,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,286 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 14:21:34,287 INFO L628 ElimStorePlain]: treesize reduction 76, result has 66.7 percent of original size [2021-06-05 14:21:34,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:34,288 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:218, output treesize:152 [2021-06-05 14:21:34,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,396 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 18 treesize of output 14 [2021-06-05 14:21:34,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,401 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 27 treesize of output 21 [2021-06-05 14:21:34,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,405 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 25 treesize of output 19 [2021-06-05 14:21:34,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,410 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 35 treesize of output 27 [2021-06-05 14:21:34,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:34,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,415 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 28 treesize of output 22 [2021-06-05 14:21:34,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:34,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,420 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 25 treesize of output 19 [2021-06-05 14:21:34,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,425 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 15 treesize of output 11 [2021-06-05 14:21:34,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,430 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 25 treesize of output 19 [2021-06-05 14:21:34,431 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,435 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 [2021-06-05 14:21:34,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,440 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 [2021-06-05 14:21:34,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:34,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,445 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 37 treesize of output 29 [2021-06-05 14:21:34,446 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:34,450 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 [2021-06-05 14:21:34,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,644 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 14:21:34,644 INFO L628 ElimStorePlain]: treesize reduction 380, result has 42.6 percent of original size [2021-06-05 14:21:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,647 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 44 treesize of output 19 [2021-06-05 14:21:34,648 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,651 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 12 treesize of output 5 [2021-06-05 14:21:34,652 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,665 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 10 treesize of output 5 [2021-06-05 14:21:34,665 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,668 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 20 treesize of output 9 [2021-06-05 14:21:34,669 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,672 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 21 treesize of output 7 [2021-06-05 14:21:34,673 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,676 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 11 treesize of output 3 [2021-06-05 14:21:34,676 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,686 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 21 treesize of output 7 [2021-06-05 14:21:34,687 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:34,690 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:34,700 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 12 treesize of output 5 [2021-06-05 14:21:34,701 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:34,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:34,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:34,773 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:507, output treesize:183 [2021-06-05 14:21:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579008940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:34,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:34,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:21:34,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195065649] [2021-06-05 14:21:34,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:21:34,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:21:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:21:34,952 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) [2021-06-05 14:21:35,524 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-05 14:21:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:35,596 INFO L93 Difference]: Finished difference Result 282 states and 800 transitions. [2021-06-05 14:21:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:21:35,596 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 [2021-06-05 14:21:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:35,597 INFO L225 Difference]: With dead ends: 282 [2021-06-05 14:21:35,597 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 14:21:35,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 993.8ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:21:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 14:21:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 219. [2021-06-05 14:21:35,599 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) [2021-06-05 14:21:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:21:35,599 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:21:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:35,600 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:21:35,600 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) [2021-06-05 14:21:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:21:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:35,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:35,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:35,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3476,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:35,800 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1305052866, now seen corresponding path program 90 times [2021-06-05 14:21:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:35,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782339646] [2021-06-05 14:21:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:35,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782339646] [2021-06-05 14:21:35,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782339646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:35,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117549375] [2021-06-05 14:21:35,955 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 [2021-06-05 14:21:35,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:21:35,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:35,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:35,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:36,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:36,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:36,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:36,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:36,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:36,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:36,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:36,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,189 INFO L628 ElimStorePlain]: treesize reduction 23, result has 85.4 percent of original size [2021-06-05 14:21:36,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:36,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:181, output treesize:134 [2021-06-05 14:21:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:36,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:36,406 INFO L628 ElimStorePlain]: treesize reduction 66, result has 66.7 percent of original size [2021-06-05 14:21:36,406 INFO L518 ElimStorePlain]: Eliminatee v_prenex_867 vanished before elimination [2021-06-05 14:21:36,418 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 30 treesize of output 24 [2021-06-05 14:21:36,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:21:36,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:36,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_869 vanished before elimination [2021-06-05 14:21:36,454 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 [2021-06-05 14:21:36,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,493 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.8 percent of original size [2021-06-05 14:21:36,494 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:36,496 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 28 treesize of output 22 [2021-06-05 14:21:36,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,498 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 19 treesize of output 15 [2021-06-05 14:21:36,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:36,518 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:21:36,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_863 vanished before elimination [2021-06-05 14:21:36,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_864 vanished before elimination [2021-06-05 14:21:36,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_865 vanished before elimination [2021-06-05 14:21:36,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:36,519 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:207, output treesize:26 [2021-06-05 14:21:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:36,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117549375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:36,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:36,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:21:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655522809] [2021-06-05 14:21:36,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:21:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:21:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:21:36,549 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) [2021-06-05 14:21:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:36,992 INFO L93 Difference]: Finished difference Result 268 states and 771 transitions. [2021-06-05 14:21:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:36,993 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 [2021-06-05 14:21:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:36,993 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:21:36,993 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 14:21:36,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 14:21:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 219. [2021-06-05 14:21:36,995 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) [2021-06-05 14:21:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:21:36,996 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:21:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:36,996 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:21:36,996 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) [2021-06-05 14:21:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:21:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:36,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:36,996 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:37,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3501 [2021-06-05 14:21:37,197 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 733598060, now seen corresponding path program 91 times [2021-06-05 14:21:37,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:37,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221707294] [2021-06-05 14:21:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:37,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:37,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221707294] [2021-06-05 14:21:37,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221707294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:37,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876697131] [2021-06-05 14:21:37,359 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 [2021-06-05 14:21:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:37,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,456 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 [2021-06-05 14:21:37,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,460 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 [2021-06-05 14:21:37,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:37,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,466 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 35 treesize of output 27 [2021-06-05 14:21:37,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:37,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:37,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:37,519 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-05 14:21:37,688 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-05 14:21:37,693 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 30 treesize of output 24 [2021-06-05 14:21:37,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:37,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,704 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 30 treesize of output 24 [2021-06-05 14:21:37,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:37,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,716 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 17 treesize of output 13 [2021-06-05 14:21:37,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:37,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:37,728 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 28 treesize of output 22 [2021-06-05 14:21:37,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-06-05 14:21:37,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:37,740 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:37,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,751 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 15 treesize of output 11 [2021-06-05 14:21:37,752 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,757 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 28 treesize of output 22 [2021-06-05 14:21:37,758 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,762 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 27 treesize of output 21 [2021-06-05 14:21:37,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:37,766 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 48 treesize of output 38 [2021-06-05 14:21:37,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,914 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 14:21:37,915 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-06-05 14:21:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,918 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 12 treesize of output 5 [2021-06-05 14:21:37,919 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,922 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 11 treesize of output 3 [2021-06-05 14:21:37,922 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:37,926 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:37,930 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,932 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 [2021-06-05 14:21:37,933 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:37,944 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,947 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 10 treesize of output 5 [2021-06-05 14:21:37,947 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:37,950 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 20 treesize of output 9 [2021-06-05 14:21:37,951 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:37,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:37,960 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 44 treesize of output 19 [2021-06-05 14:21:37,961 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:38,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:38,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:38,022 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-06-05 14:21:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876697131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:38,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:38,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:21:38,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355820134] [2021-06-05 14:21:38,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:21:38,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:21:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:21:38,158 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) [2021-06-05 14:21:38,572 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 14:21:38,766 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 14:21:39,006 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 14:21:39,281 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-05 14:21:39,545 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-05 14:21:39,820 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-05 14:21:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:39,874 INFO L93 Difference]: Finished difference Result 380 states and 1054 transitions. [2021-06-05 14:21:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:21:39,874 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 [2021-06-05 14:21:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:39,875 INFO L225 Difference]: With dead ends: 380 [2021-06-05 14:21:39,875 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:21:39,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1751.1ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:21:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 225. [2021-06-05 14:21:39,878 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) [2021-06-05 14:21:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-06-05 14:21:39,878 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-06-05 14:21:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:39,878 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-06-05 14:21:39,878 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) [2021-06-05 14:21:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-06-05 14:21:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:39,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:39,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:40,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:40,079 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:40,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1233515728, now seen corresponding path program 92 times [2021-06-05 14:21:40,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:40,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459018731] [2021-06-05 14:21:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459018731] [2021-06-05 14:21:40,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459018731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:40,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700763563] [2021-06-05 14:21:40,284 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 [2021-06-05 14:21:40,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:40,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:40,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,613 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 [2021-06-05 14:21:40,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:40,752 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 14:21:40,753 INFO L628 ElimStorePlain]: treesize reduction 43, result has 81.9 percent of original size [2021-06-05 14:21:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,757 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 25 treesize of output 19 [2021-06-05 14:21:40,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,761 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 27 treesize of output 21 [2021-06-05 14:21:40,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:40,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,826 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 17 treesize of output 13 [2021-06-05 14:21:40,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:40,830 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 15 treesize of output 11 [2021-06-05 14:21:40,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:40,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:40,892 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. [2021-06-05 14:21:40,892 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:251, output treesize:182 [2021-06-05 14:21:41,115 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 6=[array_0]} [2021-06-05 14:21:41,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,119 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 19 treesize of output 15 [2021-06-05 14:21:41,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,126 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 20 treesize of output 16 [2021-06-05 14:21:41,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,131 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 [2021-06-05 14:21:41,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:41,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:41,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,141 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 18 treesize of output 14 [2021-06-05 14:21:41,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,146 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 17 treesize of output 13 [2021-06-05 14:21:41,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,151 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 25 treesize of output 19 [2021-06-05 14:21:41,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,155 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 29 treesize of output 23 [2021-06-05 14:21:41,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,302 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 14:21:41,302 INFO L628 ElimStorePlain]: treesize reduction 32, result has 87.9 percent of original size [2021-06-05 14:21:41,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,306 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 10 treesize of output 5 [2021-06-05 14:21:41,307 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,311 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 9 treesize of output 3 [2021-06-05 14:21:41,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,315 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 20 treesize of output 9 [2021-06-05 14:21:41,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,319 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 12 treesize of output 5 [2021-06-05 14:21:41,320 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:41,324 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,328 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 21 treesize of output 7 [2021-06-05 14:21:41,329 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:41,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,340 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 11 treesize of output 3 [2021-06-05 14:21:41,340 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:41,343 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 24 treesize of output 9 [2021-06-05 14:21:41,344 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:41,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:41,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:41,411 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:301, output treesize:57 [2021-06-05 14:21:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:41,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700763563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:41,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:41,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 14:21:41,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502150648] [2021-06-05 14:21:41,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:21:41,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:21:41,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:21:41,453 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) [2021-06-05 14:21:41,815 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-06-05 14:21:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:41,991 INFO L93 Difference]: Finished difference Result 278 states and 806 transitions. [2021-06-05 14:21:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:41,991 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 [2021-06-05 14:21:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:41,992 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:21:41,992 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 14:21:41,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 807.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:21:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 14:21:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 228. [2021-06-05 14:21:41,994 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) [2021-06-05 14:21:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 681 transitions. [2021-06-05 14:21:41,995 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 681 transitions. Word has length 17 [2021-06-05 14:21:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:41,995 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 681 transitions. [2021-06-05 14:21:41,995 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) [2021-06-05 14:21:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 681 transitions. [2021-06-05 14:21:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:41,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:41,995 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:42,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3559 [2021-06-05 14:21:42,197 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 247722142, now seen corresponding path program 93 times [2021-06-05 14:21:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:42,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843159877] [2021-06-05 14:21:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:42,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:42,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843159877] [2021-06-05 14:21:42,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843159877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:42,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48683530] [2021-06-05 14:21:42,625 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 [2021-06-05 14:21:42,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:21:42,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:42,816 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 15 treesize of output 11 [2021-06-05 14:21:42,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:42,819 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 15 treesize of output 11 [2021-06-05 14:21:42,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:42,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:42,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:42,825 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 [2021-06-05 14:21:42,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:42,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:42,831 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 17 treesize of output 13 [2021-06-05 14:21:42,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:42,892 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-05 14:21:42,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:42,893 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-05 14:21:42,962 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 27 treesize of output 21 [2021-06-05 14:21:42,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:42,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:42,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:43,008 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-05 14:21:43,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_879 vanished before elimination [2021-06-05 14:21:43,008 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:21:43,008 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:43,010 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 28 treesize of output 22 [2021-06-05 14:21:43,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:43,012 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 19 treesize of output 15 [2021-06-05 14:21:43,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:43,015 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 21 treesize of output 17 [2021-06-05 14:21:43,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:43,034 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:21:43,035 INFO L518 ElimStorePlain]: Eliminatee v_prenex_881 vanished before elimination [2021-06-05 14:21:43,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:21:43,035 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:21:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:43,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48683530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:43,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:43,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 14:21:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520125041] [2021-06-05 14:21:43,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:21:43,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:43,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:21:43,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:21:43,069 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) [2021-06-05 14:21:43,675 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 14:21:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:43,720 INFO L93 Difference]: Finished difference Result 278 states and 807 transitions. [2021-06-05 14:21:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:21:43,720 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 [2021-06-05 14:21:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:43,721 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:21:43,721 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 14:21:43,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:21:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 14:21:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 226. [2021-06-05 14:21:43,723 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) [2021-06-05 14:21:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-05 14:21:43,724 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-05 14:21:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:43,724 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-05 14:21:43,724 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) [2021-06-05 14:21:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-05 14:21:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:43,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:43,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:43,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3615 [2021-06-05 14:21:43,925 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash -297453036, now seen corresponding path program 94 times [2021-06-05 14:21:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:43,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261544158] [2021-06-05 14:21:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:44,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:44,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261544158] [2021-06-05 14:21:44,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261544158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:44,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796724691] [2021-06-05 14:21:44,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:21:44,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:44,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:44,306 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 25 treesize of output 19 [2021-06-05 14:21:44,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,309 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 27 treesize of output 21 [2021-06-05 14:21:44,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:44,312 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 15 treesize of output 11 [2021-06-05 14:21:44,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:44,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:44,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:44,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:21:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,428 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 27 treesize of output 21 [2021-06-05 14:21:44,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,432 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 [2021-06-05 14:21:44,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,436 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 28 treesize of output 22 [2021-06-05 14:21:44,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,440 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 [2021-06-05 14:21:44,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,445 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 37 treesize of output 29 [2021-06-05 14:21:44,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:44,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,450 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 [2021-06-05 14:21:44,451 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,455 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 18 treesize of output 14 [2021-06-05 14:21:44,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,460 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 27 treesize of output 21 [2021-06-05 14:21:44,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,464 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 [2021-06-05 14:21:44,464 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,468 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 [2021-06-05 14:21:44,469 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,619 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:21:44,619 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:21:44,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,623 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 10 treesize of output 5 [2021-06-05 14:21:44,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,626 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 20 treesize of output 9 [2021-06-05 14:21:44,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:44,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:44,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:44,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:44,645 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,648 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 44 treesize of output 19 [2021-06-05 14:21:44,649 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,652 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 12 treesize of output 5 [2021-06-05 14:21:44,652 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:44,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:44,664 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 [2021-06-05 14:21:44,665 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,667 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 11 treesize of output 3 [2021-06-05 14:21:44,668 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:44,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:44,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:44,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:21:44,735 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:21:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:44,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796724691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:44,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:44,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259880714] [2021-06-05 14:21:44,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:44,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:44,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:44,866 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) [2021-06-05 14:21:45,361 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-06-05 14:21:45,602 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-05 14:21:45,783 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:21:46,052 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:21:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:46,101 INFO L93 Difference]: Finished difference Result 308 states and 887 transitions. [2021-06-05 14:21:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:21:46,101 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 [2021-06-05 14:21:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:46,101 INFO L225 Difference]: With dead ends: 308 [2021-06-05 14:21:46,101 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 14:21:46,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1332.7ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 14:21:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2021-06-05 14:21:46,104 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) [2021-06-05 14:21:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-05 14:21:46,104 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-05 14:21:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:46,104 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-05 14:21:46,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-05 14:21:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:46,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:46,105 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:46,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 14:21:46,305 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2016424066, now seen corresponding path program 95 times [2021-06-05 14:21:46,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:46,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547955659] [2021-06-05 14:21:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:46,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:46,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547955659] [2021-06-05 14:21:46,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547955659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:46,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001907526] [2021-06-05 14:21:46,529 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 [2021-06-05 14:21:46,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:46,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:46,657 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 [2021-06-05 14:21:46,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:46,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:46,662 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 [2021-06-05 14:21:46,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:46,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:46,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:46,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:46,669 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 25 treesize of output 19 [2021-06-05 14:21:46,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:46,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:46,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:46,725 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-06-05 14:21:46,833 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]} [2021-06-05 14:21:46,837 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 17 treesize of output 13 [2021-06-05 14:21:46,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:46,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:21:46,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,030 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-05 14:21:47,030 INFO L628 ElimStorePlain]: treesize reduction 191, result has 62.3 percent of original size [2021-06-05 14:21:47,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:47,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:47,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,124 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 27 treesize of output 21 [2021-06-05 14:21:47,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:47,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:21:47,219 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,223 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 28 treesize of output 22 [2021-06-05 14:21:47,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,227 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 28 treesize of output 22 [2021-06-05 14:21:47,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 14:21:47,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,237 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 30 treesize of output 24 [2021-06-05 14:21:47,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:21:47,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,385 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 14:21:47,385 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.1 percent of original size [2021-06-05 14:21:47,385 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:21:47,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,389 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 [2021-06-05 14:21:47,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,392 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 [2021-06-05 14:21:47,392 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,468 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 21 treesize of output 7 [2021-06-05 14:21:47,469 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,472 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 11 treesize of output 3 [2021-06-05 14:21:47,472 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:47,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,552 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 21 treesize of output 7 [2021-06-05 14:21:47,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:21:47,557 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:47,560 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 12 treesize of output 5 [2021-06-05 14:21:47,560 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:21:47,563 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:47,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:47,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:47,624 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:21:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:47,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001907526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:47,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:47,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:21:47,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646194033] [2021-06-05 14:21:47,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:47,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:47,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:47,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:47,778 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) [2021-06-05 14:21:48,282 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 14:21:48,471 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:21:48,647 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 14:21:48,951 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-05 14:21:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:49,009 INFO L93 Difference]: Finished difference Result 316 states and 900 transitions. [2021-06-05 14:21:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:21:49,009 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 [2021-06-05 14:21:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:49,010 INFO L225 Difference]: With dead ends: 316 [2021-06-05 14:21:49,010 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:21:49,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1320.6ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:21:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:21:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 225. [2021-06-05 14:21:49,012 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) [2021-06-05 14:21:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-06-05 14:21:49,013 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-06-05 14:21:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:49,013 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-06-05 14:21:49,013 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) [2021-06-05 14:21:49,013 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-06-05 14:21:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:49,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:49,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:49,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:49,216 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1942193160, now seen corresponding path program 96 times [2021-06-05 14:21:49,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:49,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184332718] [2021-06-05 14:21:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184332718] [2021-06-05 14:21:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184332718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546599418] [2021-06-05 14:21:49,398 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 [2021-06-05 14:21:49,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:21:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:21:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:49,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,526 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 25 treesize of output 19 [2021-06-05 14:21:49,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:49,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:49,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:21:49,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:49,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:21:49,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:49,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:49,608 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. [2021-06-05 14:21:49,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:203, output treesize:193 [2021-06-05 14:21:50,085 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 104 [2021-06-05 14:21:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,539 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 27 treesize of output 21 [2021-06-05 14:21:50,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,547 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 [2021-06-05 14:21:50,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:50,798 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 117 [2021-06-05 14:21:50,798 INFO L628 ElimStorePlain]: treesize reduction 195, result has 59.9 percent of original size [2021-06-05 14:21:50,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,804 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 27 treesize of output 21 [2021-06-05 14:21:50,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:50,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:50,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,907 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 10 treesize of output 5 [2021-06-05 14:21:50,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:50,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:50,913 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 [2021-06-05 14:21:50,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:50,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,022 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 7 treesize of output 5 [2021-06-05 14:21:51,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-06-05 14:21:51,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,122 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 19 treesize of output 15 [2021-06-05 14:21:51,122 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,128 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 17 [2021-06-05 14:21:51,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:21:51,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:21:51,313 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:21:51,319 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,404 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-05 14:21:51,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,410 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 28 treesize of output 22 [2021-06-05 14:21:51,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,415 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 30 treesize of output 24 [2021-06-05 14:21:51,416 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:21:51,500 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,505 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 [2021-06-05 14:21:51,505 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:51,586 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 11 treesize of output 3 [2021-06-05 14:21:51,587 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:51,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:51,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:21:51,665 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:482, output treesize:66 [2021-06-05 14:21:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:51,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546599418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:51,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:51,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:21:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297992870] [2021-06-05 14:21:51,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:51,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:51,716 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) [2021-06-05 14:21:52,272 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 141 [2021-06-05 14:21:52,736 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 176 [2021-06-05 14:21:53,028 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 151 [2021-06-05 14:21:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:53,105 INFO L93 Difference]: Finished difference Result 347 states and 980 transitions. [2021-06-05 14:21:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:53,105 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 [2021-06-05 14:21:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:53,105 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:21:53,105 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:21:53,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1629.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:21:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:21:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 224. [2021-06-05 14:21:53,108 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) [2021-06-05 14:21:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 668 transitions. [2021-06-05 14:21:53,108 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 668 transitions. Word has length 17 [2021-06-05 14:21:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:53,108 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 668 transitions. [2021-06-05 14:21:53,108 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) [2021-06-05 14:21:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 668 transitions. [2021-06-05 14:21:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:53,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:53,109 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:53,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3672 [2021-06-05 14:21:53,309 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 933193372, now seen corresponding path program 97 times [2021-06-05 14:21:53,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:53,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763705131] [2021-06-05 14:21:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:53,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:53,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763705131] [2021-06-05 14:21:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763705131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726969697] [2021-06-05 14:21:53,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:21:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:53,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,656 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 [2021-06-05 14:21:53,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,660 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 [2021-06-05 14:21:53,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:53,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,665 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 [2021-06-05 14:21:53,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:53,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:53,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:21:53,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:53,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:53,726 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. [2021-06-05 14:21:53,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:173 [2021-06-05 14:21:54,182 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 106 [2021-06-05 14:21:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,426 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 27 treesize of output 21 [2021-06-05 14:21:54,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,434 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 [2021-06-05 14:21:54,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:54,703 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2021-06-05 14:21:54,704 INFO L628 ElimStorePlain]: treesize reduction 222, result has 49.9 percent of original size [2021-06-05 14:21:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,708 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 11 treesize of output 3 [2021-06-05 14:21:54,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:54,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:54,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_935 vanished before elimination [2021-06-05 14:21:54,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_936 vanished before elimination [2021-06-05 14:21:54,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,782 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 30 treesize of output 24 [2021-06-05 14:21:54,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:54,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,787 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 28 treesize of output 22 [2021-06-05 14:21:54,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:54,912 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 14:21:54,912 INFO L628 ElimStorePlain]: treesize reduction 11, result has 94.5 percent of original size [2021-06-05 14:21:54,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,917 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 17 [2021-06-05 14:21:54,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:54,932 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 19 treesize of output 15 [2021-06-05 14:21:54,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:55,048 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 14:21:55,049 INFO L628 ElimStorePlain]: treesize reduction 30, result has 82.8 percent of original size [2021-06-05 14:21:55,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:55,054 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 11 treesize of output 3 [2021-06-05 14:21:55,054 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:55,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:55,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:55,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:55,112 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 21 treesize of output 7 [2021-06-05 14:21:55,113 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:55,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:55,117 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 12 treesize of output 5 [2021-06-05 14:21:55,118 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:55,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:55,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_939 vanished before elimination [2021-06-05 14:21:55,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_940 vanished before elimination [2021-06-05 14:21:55,174 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 7 treesize of output 5 [2021-06-05 14:21:55,175 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:55,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:55,226 INFO L518 ElimStorePlain]: Eliminatee v_prenex_942 vanished before elimination [2021-06-05 14:21:55,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:21:55,229 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:439, output treesize:31 [2021-06-05 14:21:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:55,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726969697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:55,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:55,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:21:55,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884879713] [2021-06-05 14:21:55,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:55,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:55,283 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) [2021-06-05 14:21:55,832 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2021-06-05 14:21:56,335 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 145 [2021-06-05 14:21:56,502 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 14:21:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:56,552 INFO L93 Difference]: Finished difference Result 320 states and 915 transitions. [2021-06-05 14:21:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:21:56,553 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 [2021-06-05 14:21:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:56,553 INFO L225 Difference]: With dead ends: 320 [2021-06-05 14:21:56,553 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:21:56,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1557.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:21:56,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:21:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 223. [2021-06-05 14:21:56,556 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) [2021-06-05 14:21:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 664 transitions. [2021-06-05 14:21:56,556 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 664 transitions. Word has length 17 [2021-06-05 14:21:56,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:56,556 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 664 transitions. [2021-06-05 14:21:56,556 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) [2021-06-05 14:21:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 664 transitions. [2021-06-05 14:21:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:56,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:56,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:56,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-05 14:21:56,757 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:56,758 INFO L82 PathProgramCache]: Analyzing trace with hash 267189852, now seen corresponding path program 98 times [2021-06-05 14:21:56,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:56,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062641488] [2021-06-05 14:21:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062641488] [2021-06-05 14:21:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062641488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848766357] [2021-06-05 14:21:57,022 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 [2021-06-05 14:21:57,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:21:57,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:57,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:57,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,109 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 [2021-06-05 14:21:57,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,113 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 35 treesize of output 27 [2021-06-05 14:21:57,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:21:57,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,123 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 25 treesize of output 19 [2021-06-05 14:21:57,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:57,180 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-06-05 14:21:57,523 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]} [2021-06-05 14:21:57,530 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 28 treesize of output 22 [2021-06-05 14:21:57,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:21:57,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,660 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-05 14:21:57,660 INFO L628 ElimStorePlain]: treesize reduction 122, result has 59.3 percent of original size [2021-06-05 14:21:57,664 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 28 treesize of output 22 [2021-06-05 14:21:57,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:21:57,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,712 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 27 treesize of output 21 [2021-06-05 14:21:57,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:57,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,760 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 27 treesize of output 21 [2021-06-05 14:21:57,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:21:57,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,814 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 7 treesize of output 5 [2021-06-05 14:21:57,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,865 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 [2021-06-05 14:21:57,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,916 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 21 treesize of output 7 [2021-06-05 14:21:57,917 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,920 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 11 treesize of output 3 [2021-06-05 14:21:57,920 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,975 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 [2021-06-05 14:21:57,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:57,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:57,979 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 24 treesize of output 9 [2021-06-05 14:21:57,980 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:58,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:58,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:58,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:58,026 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 10 treesize of output 5 [2021-06-05 14:21:58,026 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:58,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:58,029 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 [2021-06-05 14:21:58,030 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:58,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:58,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:58,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_953 vanished before elimination [2021-06-05 14:21:58,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:21:58,081 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:63 [2021-06-05 14:21:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:58,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848766357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:58,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:58,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:21:58,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126145278] [2021-06-05 14:21:58,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:21:58,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:58,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:21:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:21:58,135 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) [2021-06-05 14:21:58,541 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 14:21:58,810 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:21:59,106 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2021-06-05 14:21:59,382 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 14:21:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:59,418 INFO L93 Difference]: Finished difference Result 317 states and 906 transitions. [2021-06-05 14:21:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:21:59,418 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 [2021-06-05 14:21:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:59,419 INFO L225 Difference]: With dead ends: 317 [2021-06-05 14:21:59,419 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 14:21:59,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1544.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:21:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 14:21:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-06-05 14:21:59,421 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) [2021-06-05 14:21:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 659 transitions. [2021-06-05 14:21:59,421 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 659 transitions. Word has length 17 [2021-06-05 14:21:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:59,422 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 659 transitions. [2021-06-05 14:21:59,422 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) [2021-06-05 14:21:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 659 transitions. [2021-06-05 14:21:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:21:59,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:59,422 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:59,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3818 [2021-06-05 14:21:59,622 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:21:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1878980908, now seen corresponding path program 99 times [2021-06-05 14:21:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:59,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128193991] [2021-06-05 14:21:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:21:59,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128193991] [2021-06-05 14:21:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128193991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525781902] [2021-06-05 14:21:59,812 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 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 [2021-06-05 14:21:59,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:21:59,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:21:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:59,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:59,905 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 [2021-06-05 14:21:59,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:59,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:59,908 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 15 treesize of output 11 [2021-06-05 14:21:59,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:59,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:21:59,911 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 25 treesize of output 19 [2021-06-05 14:21:59,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:21:59,914 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 35 treesize of output 27 [2021-06-05 14:21:59,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:21:59,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:21:59,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:21:59,967 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-05 14:22:00,133 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 21 treesize of output 17 [2021-06-05 14:22:00,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:00,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:00,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:00,143 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 19 treesize of output 15 [2021-06-05 14:22:00,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:00,146 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 27 treesize of output 21 [2021-06-05 14:22:00,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:00,167 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:22:00,167 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:00,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:00,167 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:104, output treesize:26 [2021-06-05 14:22:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:00,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525781902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:00,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:00,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:00,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981645109] [2021-06-05 14:22:00,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:00,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:00,202 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) [2021-06-05 14:22:00,534 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 14:22:00,728 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 14:22:00,869 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 14:22:01,049 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 14:22:01,227 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 14:22:01,400 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 14:22:01,583 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-05 14:22:01,792 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 14:22:01,963 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-05 14:22:02,244 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 14:22:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:02,276 INFO L93 Difference]: Finished difference Result 337 states and 960 transitions. [2021-06-05 14:22:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:22:02,276 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 [2021-06-05 14:22:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:02,277 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:22:02,277 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 14:22:02,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2115.8ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:22:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 14:22:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 219. [2021-06-05 14:22:02,279 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) [2021-06-05 14:22:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:02,280 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:02,280 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:02,280 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) [2021-06-05 14:22:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:02,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:02,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:02,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3843,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:02,480 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 692518350, now seen corresponding path program 100 times [2021-06-05 14:22:02,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:02,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812343319] [2021-06-05 14:22:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:02,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:02,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812343319] [2021-06-05 14:22:02,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812343319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:02,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966983704] [2021-06-05 14:22:02,672 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 [2021-06-05 14:22:02,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:02,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:02,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,778 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 27 treesize of output 21 [2021-06-05 14:22:02,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:02,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:02,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,784 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 25 treesize of output 19 [2021-06-05 14:22:02,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:02,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:02,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:123 [2021-06-05 14:22:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:02,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:02,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,915 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 25 treesize of output 19 [2021-06-05 14:22:02,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:02,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,924 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 37 treesize of output 29 [2021-06-05 14:22:02,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,929 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 35 treesize of output 27 [2021-06-05 14:22:02,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,935 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 28 treesize of output 22 [2021-06-05 14:22:02,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:02,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:02,945 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 27 treesize of output 21 [2021-06-05 14:22:02,945 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:02,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:02,949 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,116 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-05 14:22:03,116 INFO L628 ElimStorePlain]: treesize reduction 183, result has 59.0 percent of original size [2021-06-05 14:22:03,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:03,121 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:03,125 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,128 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 [2021-06-05 14:22:03,129 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:03,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:03,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,144 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 21 treesize of output 7 [2021-06-05 14:22:03,144 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:03,149 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:03,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:22:03,160 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:03,164 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:03,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:22:03,176 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:03,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:03,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:03,246 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:373, output treesize:164 [2021-06-05 14:22:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:03,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966983704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:03,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:03,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:22:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074755079] [2021-06-05 14:22:03,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:03,402 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) [2021-06-05 14:22:03,877 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:22:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:03,910 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-06-05 14:22:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:22:03,910 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 [2021-06-05 14:22:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:03,910 INFO L225 Difference]: With dead ends: 259 [2021-06-05 14:22:03,910 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 14:22:03,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 14:22:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-06-05 14:22:03,912 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) [2021-06-05 14:22:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-05 14:22:03,913 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-05 14:22:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:03,913 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-05 14:22:03,913 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) [2021-06-05 14:22:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-05 14:22:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:03,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:03,914 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:04,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3856 [2021-06-05 14:22:04,133 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash -2121211076, now seen corresponding path program 101 times [2021-06-05 14:22:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113639163] [2021-06-05 14:22:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:04,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:04,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113639163] [2021-06-05 14:22:04,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113639163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592047192] [2021-06-05 14:22:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:22:04,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:22:04,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:04,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,495 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 15 treesize of output 11 [2021-06-05 14:22:04,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,499 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 35 treesize of output 27 [2021-06-05 14:22:04,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:04,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,504 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 25 treesize of output 19 [2021-06-05 14:22:04,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:04,508 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 25 treesize of output 19 [2021-06-05 14:22:04,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:04,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:04,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:223 [2021-06-05 14:22:04,679 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]} [2021-06-05 14:22:04,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:04,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,689 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 27 treesize of output 21 [2021-06-05 14:22:04,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:04,910 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 14:22:04,910 INFO L628 ElimStorePlain]: treesize reduction 212, result has 62.5 percent of original size [2021-06-05 14:22:04,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:04,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,920 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 48 treesize of output 38 [2021-06-05 14:22:04,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:04,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:04,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,940 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 [2021-06-05 14:22:04,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:04,946 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 [2021-06-05 14:22:04,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,105 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 14:22:05,105 INFO L628 ElimStorePlain]: treesize reduction 52, result has 83.2 percent of original size [2021-06-05 14:22:05,109 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 7 treesize of output 5 [2021-06-05 14:22:05,110 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,187 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 [2021-06-05 14:22:05,188 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:05,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,270 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 [2021-06-05 14:22:05,271 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,274 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 20 treesize of output 9 [2021-06-05 14:22:05,275 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:05,361 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:05,366 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,370 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 44 treesize of output 19 [2021-06-05 14:22:05,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,374 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 21 treesize of output 7 [2021-06-05 14:22:05,375 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,378 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 12 treesize of output 5 [2021-06-05 14:22:05,378 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_960 vanished before elimination [2021-06-05 14:22:05,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:05,457 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:05,459 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 [2021-06-05 14:22:05,460 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:05,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:05,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:05,535 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-05 14:22:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:05,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592047192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:05,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:05,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:22:05,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003296320] [2021-06-05 14:22:05,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:05,692 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) [2021-06-05 14:22:06,077 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 14:22:06,267 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 14:22:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:06,441 INFO L93 Difference]: Finished difference Result 268 states and 765 transitions. [2021-06-05 14:22:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:06,441 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 [2021-06-05 14:22:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:06,441 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:22:06,441 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 14:22:06,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 950.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:22:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 14:22:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2021-06-05 14:22:06,444 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) [2021-06-05 14:22:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-06-05 14:22:06,444 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-06-05 14:22:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:06,444 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-06-05 14:22:06,444 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) [2021-06-05 14:22:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-06-05 14:22:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:06,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:06,445 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:06,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:06,645 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 502780204, now seen corresponding path program 102 times [2021-06-05 14:22:06,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:06,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809847901] [2021-06-05 14:22:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:06,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:06,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809847901] [2021-06-05 14:22:06,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809847901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:06,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830535502] [2021-06-05 14:22:06,923 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 [2021-06-05 14:22:06,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:22:06,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:07,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:07,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:07,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:07,126 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 25 treesize of output 19 [2021-06-05 14:22:07,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:07,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:07,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,189 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-05 14:22:07,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:07,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-05 14:22:07,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:22:07,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:07,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:07,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,272 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 28 treesize of output 22 [2021-06-05 14:22:07,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,309 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-06-05 14:22:07,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_966 vanished before elimination [2021-06-05 14:22:07,309 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:22:07,309 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:07,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:07,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:07,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:07,321 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-06-05 14:22:07,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:07,321 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:22:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:07,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830535502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:07,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:07,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:07,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513233314] [2021-06-05 14:22:07,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:07,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:07,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:07,353 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) [2021-06-05 14:22:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:07,990 INFO L93 Difference]: Finished difference Result 268 states and 757 transitions. [2021-06-05 14:22:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:07,990 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 [2021-06-05 14:22:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:07,990 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:22:07,990 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 14:22:07,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 14:22:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 220. [2021-06-05 14:22:07,993 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) [2021-06-05 14:22:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-06-05 14:22:07,993 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-06-05 14:22:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:07,993 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-06-05 14:22:07,993 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) [2021-06-05 14:22:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-06-05 14:22:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:07,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:07,994 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:08,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-05 14:22:08,194 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1572294666, now seen corresponding path program 103 times [2021-06-05 14:22:08,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:08,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295644070] [2021-06-05 14:22:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:08,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295644070] [2021-06-05 14:22:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295644070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:08,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483019877] [2021-06-05 14:22:08,442 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 [2021-06-05 14:22:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:08,549 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 25 treesize of output 19 [2021-06-05 14:22:08,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,553 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 [2021-06-05 14:22:08,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:08,556 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 [2021-06-05 14:22:08,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:08,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:08,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:08,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:22:08,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,683 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 27 treesize of output 21 [2021-06-05 14:22:08,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:08,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,687 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 25 treesize of output 19 [2021-06-05 14:22:08,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,692 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 28 treesize of output 22 [2021-06-05 14:22:08,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:08,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,696 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 15 treesize of output 11 [2021-06-05 14:22:08,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,700 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 35 treesize of output 27 [2021-06-05 14:22:08,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:08,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 14:22:08,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:08,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:08,710 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,714 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 [2021-06-05 14:22:08,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,718 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 27 treesize of output 21 [2021-06-05 14:22:08,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,722 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 18 treesize of output 14 [2021-06-05 14:22:08,722 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,874 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:22:08,875 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-05 14:22:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:22:08,879 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:08,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,885 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 21 treesize of output 7 [2021-06-05 14:22:08,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,889 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 11 treesize of output 3 [2021-06-05 14:22:08,889 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:08,900 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,903 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 44 treesize of output 19 [2021-06-05 14:22:08,904 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,906 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 12 treesize of output 5 [2021-06-05 14:22:08,907 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:08,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:08,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:08,920 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,922 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 11 treesize of output 3 [2021-06-05 14:22:08,922 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:08,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:08,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:08,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:08,990 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:22:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:09,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483019877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:09,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:09,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647922050] [2021-06-05 14:22:09,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:09,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:09,122 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) [2021-06-05 14:22:09,586 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 14:22:09,779 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:22:10,062 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:22:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:10,112 INFO L93 Difference]: Finished difference Result 269 states and 773 transitions. [2021-06-05 14:22:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:22:10,112 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 [2021-06-05 14:22:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:10,113 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:22:10,113 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:22:10,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:22:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-06-05 14:22:10,115 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) [2021-06-05 14:22:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-05 14:22:10,116 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-05 14:22:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:10,116 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-05 14:22:10,116 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) [2021-06-05 14:22:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-05 14:22:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:10,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:10,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:10,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-06-05 14:22:10,317 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:10,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1907866476, now seen corresponding path program 104 times [2021-06-05 14:22:10,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:10,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322114119] [2021-06-05 14:22:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:10,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322114119] [2021-06-05 14:22:10,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322114119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:10,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289385265] [2021-06-05 14:22:10,586 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 [2021-06-05 14:22:10,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:10,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:22:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:10,702 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 [2021-06-05 14:22:10,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,715 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 [2021-06-05 14:22:10,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:10,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:10,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,748 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 25 treesize of output 19 [2021-06-05 14:22:10,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:10,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:10,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:100 [2021-06-05 14:22:10,830 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 21 treesize of output 17 [2021-06-05 14:22:10,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,834 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 28 treesize of output 22 [2021-06-05 14:22:10,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,837 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 19 treesize of output 15 [2021-06-05 14:22:10,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:10,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:10,877 INFO L628 ElimStorePlain]: treesize reduction 18, result has 80.4 percent of original size [2021-06-05 14:22:10,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:10,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:10,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:10,899 INFO L518 ElimStorePlain]: Eliminatee v_prenex_969 vanished before elimination [2021-06-05 14:22:10,899 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:22:10,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:10,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:10,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:10,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_971 vanished before elimination [2021-06-05 14:22:10,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:10,923 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:164, output treesize:52 [2021-06-05 14:22:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:10,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289385265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:10,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:10,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 14:22:10,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123167437] [2021-06-05 14:22:10,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:10,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:10,972 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) [2021-06-05 14:22:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:11,332 INFO L93 Difference]: Finished difference Result 255 states and 740 transitions. [2021-06-05 14:22:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:22:11,332 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 [2021-06-05 14:22:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:11,333 INFO L225 Difference]: With dead ends: 255 [2021-06-05 14:22:11,333 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 14:22:11,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 14:22:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-06-05 14:22:11,335 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) [2021-06-05 14:22:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-06-05 14:22:11,335 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-06-05 14:22:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:11,335 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-06-05 14:22:11,335 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) [2021-06-05 14:22:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-06-05 14:22:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:11,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:11,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:11,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-05 14:22:11,536 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1365201684, now seen corresponding path program 105 times [2021-06-05 14:22:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:11,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662560080] [2021-06-05 14:22:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:11,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662560080] [2021-06-05 14:22:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662560080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731773591] [2021-06-05 14:22:11,729 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 [2021-06-05 14:22:11,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:11,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,860 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 15 treesize of output 11 [2021-06-05 14:22:11,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:11,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:11,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:11,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:11,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:11,874 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 [2021-06-05 14:22:11,875 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:11,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:11,943 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. [2021-06-05 14:22:11,943 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:187 [2021-06-05 14:22:12,398 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 85 [2021-06-05 14:22:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:12,692 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 [2021-06-05 14:22:12,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:12,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:12,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:12,917 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2021-06-05 14:22:12,917 INFO L628 ElimStorePlain]: treesize reduction 150, result has 62.2 percent of original size [2021-06-05 14:22:12,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:12,923 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 19 treesize of output 15 [2021-06-05 14:22:12,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,000 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:13,005 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 7 treesize of output 5 [2021-06-05 14:22:13,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,087 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 [2021-06-05 14:22:13,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,163 INFO L518 ElimStorePlain]: Eliminatee v_prenex_991 vanished before elimination [2021-06-05 14:22:13,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,167 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 27 treesize of output 21 [2021-06-05 14:22:13,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:13,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,253 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 10 treesize of output 5 [2021-06-05 14:22:13,254 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:13,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,348 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 19 treesize of output 15 [2021-06-05 14:22:13,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:22:13,354 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,431 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 [2021-06-05 14:22:13,432 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,436 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 [2021-06-05 14:22:13,437 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,511 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 28 treesize of output 22 [2021-06-05 14:22:13,512 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,516 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 30 treesize of output 24 [2021-06-05 14:22:13,517 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,584 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 24 treesize of output 9 [2021-06-05 14:22:13,585 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:13,589 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 21 treesize of output 7 [2021-06-05 14:22:13,590 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:13,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:13,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:22:13,653 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:411, output treesize:62 [2021-06-05 14:22:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:13,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731773591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:13,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:13,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:22:13,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159794134] [2021-06-05 14:22:13,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:22:13,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:13,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:22:13,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:13,702 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) [2021-06-05 14:22:14,069 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-05 14:22:14,599 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 148 [2021-06-05 14:22:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:14,786 INFO L93 Difference]: Finished difference Result 253 states and 730 transitions. [2021-06-05 14:22:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:14,786 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 [2021-06-05 14:22:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:14,787 INFO L225 Difference]: With dead ends: 253 [2021-06-05 14:22:14,787 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 14:22:14,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1296.0ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 14:22:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-05 14:22:14,789 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) [2021-06-05 14:22:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-06-05 14:22:14,789 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-06-05 14:22:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:14,790 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-06-05 14:22:14,790 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) [2021-06-05 14:22:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-06-05 14:22:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:14,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:14,790 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:14,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:14,990 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash 50467208, now seen corresponding path program 106 times [2021-06-05 14:22:14,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:14,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659762891] [2021-06-05 14:22:14,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:15,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659762891] [2021-06-05 14:22:15,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659762891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193644882] [2021-06-05 14:22:15,230 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 [2021-06-05 14:22:15,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:15,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:15,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,348 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 15 treesize of output 11 [2021-06-05 14:22:15,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:15,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,356 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 [2021-06-05 14:22:15,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:15,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:15,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:15,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:15,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-06-05 14:22:15,534 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]} [2021-06-05 14:22:15,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:15,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:15,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,550 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 28 treesize of output 22 [2021-06-05 14:22:15,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,555 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 30 treesize of output 24 [2021-06-05 14:22:15,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,560 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 46 treesize of output 36 [2021-06-05 14:22:15,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:15,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,571 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 30 treesize of output 24 [2021-06-05 14:22:15,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,576 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 28 treesize of output 22 [2021-06-05 14:22:15,577 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,751 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 14:22:15,751 INFO L628 ElimStorePlain]: treesize reduction 257, result has 49.2 percent of original size [2021-06-05 14:22:15,755 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 27 treesize of output 21 [2021-06-05 14:22:15,756 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:15,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:15,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:22:15,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:15,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:15,920 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 27 treesize of output 21 [2021-06-05 14:22:15,921 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:15,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:16,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,008 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 [2021-06-05 14:22:16,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,012 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 44 treesize of output 19 [2021-06-05 14:22:16,013 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:16,017 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,021 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 [2021-06-05 14:22:16,021 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,099 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 10 treesize of output 5 [2021-06-05 14:22:16,100 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,103 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 20 treesize of output 9 [2021-06-05 14:22:16,104 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,180 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1005 vanished before elimination [2021-06-05 14:22:16,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,184 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 21 treesize of output 7 [2021-06-05 14:22:16,185 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:16,187 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 11 treesize of output 3 [2021-06-05 14:22:16,188 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:16,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:16,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:16,265 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-05 14:22:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:16,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193644882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:16,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:16,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:22:16,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97829685] [2021-06-05 14:22:16,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:16,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:16,440 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) [2021-06-05 14:22:16,819 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 14:22:17,015 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 14:22:17,234 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 14:22:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:17,270 INFO L93 Difference]: Finished difference Result 276 states and 782 transitions. [2021-06-05 14:22:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:17,270 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 [2021-06-05 14:22:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:17,271 INFO L225 Difference]: With dead ends: 276 [2021-06-05 14:22:17,271 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 14:22:17,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1095.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:22:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 14:22:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2021-06-05 14:22:17,273 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) [2021-06-05 14:22:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-06-05 14:22:17,274 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-06-05 14:22:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:17,274 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-06-05 14:22:17,274 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) [2021-06-05 14:22:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-06-05 14:22:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:17,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:17,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:17,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-05 14:22:17,475 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash 592786076, now seen corresponding path program 107 times [2021-06-05 14:22:17,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:17,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8392932] [2021-06-05 14:22:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:17,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8392932] [2021-06-05 14:22:17,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8392932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538326782] [2021-06-05 14:22:17,648 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 [2021-06-05 14:22:17,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:17,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:17,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:17,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:17,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:17,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:17,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:17,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:17,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:17,765 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 25 treesize of output 19 [2021-06-05 14:22:17,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:17,769 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 [2021-06-05 14:22:17,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:17,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:17,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:17,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-05 14:22:17,897 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]} [2021-06-05 14:22:17,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:17,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:17,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:17,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:18,069 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 14:22:18,070 INFO L628 ElimStorePlain]: treesize reduction 145, result has 65.0 percent of original size [2021-06-05 14:22:18,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:18,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,077 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 27 treesize of output 21 [2021-06-05 14:22:18,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:18,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,157 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 38 treesize of output 30 [2021-06-05 14:22:18,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:18,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:18,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,166 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 21 treesize of output 17 [2021-06-05 14:22:18,167 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:18,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,321 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 14:22:18,321 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.2 percent of original size [2021-06-05 14:22:18,325 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 [2021-06-05 14:22:18,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,464 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 14:22:18,464 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.5 percent of original size [2021-06-05 14:22:18,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,468 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 12 treesize of output 5 [2021-06-05 14:22:18,469 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,472 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 11 treesize of output 3 [2021-06-05 14:22:18,473 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,476 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 [2021-06-05 14:22:18,477 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,480 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 46 treesize of output 15 [2021-06-05 14:22:18,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,493 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 21 treesize of output 7 [2021-06-05 14:22:18,493 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,560 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 11 treesize of output 3 [2021-06-05 14:22:18,561 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,563 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 21 treesize of output 7 [2021-06-05 14:22:18,564 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,633 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1012 vanished before elimination [2021-06-05 14:22:18,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:18,636 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 20 treesize of output 9 [2021-06-05 14:22:18,637 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,639 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 20 treesize of output 9 [2021-06-05 14:22:18,640 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:18,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:18,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:18,712 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-06-05 14:22:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:18,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538326782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:18,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:18,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:22:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919939749] [2021-06-05 14:22:18,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:18,848 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) [2021-06-05 14:22:19,497 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:22:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:19,552 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-06-05 14:22:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:19,553 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 [2021-06-05 14:22:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:19,553 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:22:19,553 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 14:22:19,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:22:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 14:22:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 222. [2021-06-05 14:22:19,556 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) [2021-06-05 14:22:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-05 14:22:19,556 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-05 14:22:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:19,556 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-05 14:22:19,556 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) [2021-06-05 14:22:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-05 14:22:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:19,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:19,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:19,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4050 [2021-06-05 14:22:19,757 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1022618172, now seen corresponding path program 108 times [2021-06-05 14:22:19,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:19,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793588537] [2021-06-05 14:22:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:19,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793588537] [2021-06-05 14:22:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793588537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005448423] [2021-06-05 14:22:19,890 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 [2021-06-05 14:22:19,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:22:19,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:20,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,021 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 17 treesize of output 13 [2021-06-05 14:22:20,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,025 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 25 treesize of output 19 [2021-06-05 14:22:20,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,030 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 [2021-06-05 14:22:20,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,033 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 [2021-06-05 14:22:20,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:20,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:20,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:20,079 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:22:20,166 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]} [2021-06-05 14:22:20,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:22:20,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:20,176 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 28 treesize of output 22 [2021-06-05 14:22:20,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:20,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,185 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 38 treesize of output 30 [2021-06-05 14:22:20,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:20,385 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:22:20,385 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-06-05 14:22:20,389 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 [2021-06-05 14:22:20,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:20,570 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 14:22:20,570 INFO L628 ElimStorePlain]: treesize reduction 39, result has 88.2 percent of original size [2021-06-05 14:22:20,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:20,574 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:20,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:20,578 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:20,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:22:20,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,825 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 14:22:20,825 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.9 percent of original size [2021-06-05 14:22:20,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,829 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 12 treesize of output 5 [2021-06-05 14:22:20,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,834 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 44 treesize of output 19 [2021-06-05 14:22:20,835 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,848 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 12 treesize of output 5 [2021-06-05 14:22:20,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,853 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 11 treesize of output 3 [2021-06-05 14:22:20,853 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,857 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 21 treesize of output 7 [2021-06-05 14:22:20,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,941 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 11 treesize of output 3 [2021-06-05 14:22:20,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:20,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:20,945 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:20,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:21,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:21,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:21,027 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:21,030 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 10 treesize of output 5 [2021-06-05 14:22:21,030 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:21,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:21,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:21,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1018 vanished before elimination [2021-06-05 14:22:21,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:21,106 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-05 14:22:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:21,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005448423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:22:21,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751339628] [2021-06-05 14:22:21,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:22:21,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:22:21,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:22:21,274 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) [2021-06-05 14:22:21,611 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 14:22:21,781 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 14:22:22,002 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 14:22:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:22,037 INFO L93 Difference]: Finished difference Result 263 states and 754 transitions. [2021-06-05 14:22:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:22,038 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 [2021-06-05 14:22:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:22,038 INFO L225 Difference]: With dead ends: 263 [2021-06-05 14:22:22,038 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 14:22:22,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 886.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 14:22:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-05 14:22:22,040 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) [2021-06-05 14:22:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:22,041 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:22,041 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:22,041 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) [2021-06-05 14:22:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:22,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:22,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:22,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:22,245 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1599914564, now seen corresponding path program 109 times [2021-06-05 14:22:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:22,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064556158] [2021-06-05 14:22:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:22,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064556158] [2021-06-05 14:22:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064556158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242237477] [2021-06-05 14:22:22,548 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 [2021-06-05 14:22:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:22,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,647 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 [2021-06-05 14:22:22,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:22:22,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:22,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,656 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 [2021-06-05 14:22:22,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:22,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:22,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:22,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:22,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-06-05 14:22:22,906 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-05 14:22:22,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:22,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,913 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 [2021-06-05 14:22:22,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:22,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 14:22:22,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,925 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 [2021-06-05 14:22:22,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:22,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,934 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 [2021-06-05 14:22:22,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:22,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:22,944 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,947 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 28 treesize of output 22 [2021-06-05 14:22:22,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:22,953 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,956 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 28 treesize of output 22 [2021-06-05 14:22:22,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,971 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 30 treesize of output 24 [2021-06-05 14:22:22,972 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:22,976 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,145 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-05 14:22:23,145 INFO L628 ElimStorePlain]: treesize reduction 213, result has 55.7 percent of original size [2021-06-05 14:22:23,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,149 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 12 treesize of output 5 [2021-06-05 14:22:23,149 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,153 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 11 treesize of output 3 [2021-06-05 14:22:23,153 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,157 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 44 treesize of output 19 [2021-06-05 14:22:23,157 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,161 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 [2021-06-05 14:22:23,162 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,165 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 12 treesize of output 5 [2021-06-05 14:22:23,166 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:23,169 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:23,173 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,184 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 10 treesize of output 5 [2021-06-05 14:22:23,184 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:23,187 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 20 treesize of output 9 [2021-06-05 14:22:23,188 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:23,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:23,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:23,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:23,264 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:575, output treesize:169 [2021-06-05 14:22:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242237477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:23,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:23,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 14:22:23,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413945073] [2021-06-05 14:22:23,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:23,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:23,430 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) [2021-06-05 14:22:23,870 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 14:22:24,116 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 14:22:24,459 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-05 14:22:24,845 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-05 14:22:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:24,895 INFO L93 Difference]: Finished difference Result 323 states and 924 transitions. [2021-06-05 14:22:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:24,895 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 [2021-06-05 14:22:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:24,895 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:22:24,895 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 14:22:24,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1672.6ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:22:24,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 14:22:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 226. [2021-06-05 14:22:24,898 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) [2021-06-05 14:22:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-05 14:22:24,898 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-05 14:22:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:24,898 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-05 14:22:24,898 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) [2021-06-05 14:22:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-05 14:22:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:24,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:24,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:25,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-06-05 14:22:25,099 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1024076716, now seen corresponding path program 110 times [2021-06-05 14:22:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:25,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625668164] [2021-06-05 14:22:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:25,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625668164] [2021-06-05 14:22:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625668164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796327378] [2021-06-05 14:22:25,319 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 [2021-06-05 14:22:25,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:25,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:25,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,420 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 [2021-06-05 14:22:25,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,423 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 [2021-06-05 14:22:25,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,428 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 25 treesize of output 19 [2021-06-05 14:22:25,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:25,432 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 25 treesize of output 19 [2021-06-05 14:22:25,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:25,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:25,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:22:25,853 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]} [2021-06-05 14:22:25,858 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 15 treesize of output 11 [2021-06-05 14:22:25,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:25,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:25,971 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 14:22:25,971 INFO L628 ElimStorePlain]: treesize reduction 103, result has 64.0 percent of original size [2021-06-05 14:22:25,975 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 30 treesize of output 24 [2021-06-05 14:22:25,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,024 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 28 treesize of output 22 [2021-06-05 14:22:26,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:26,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,071 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 27 treesize of output 21 [2021-06-05 14:22:26,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:26,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:26,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:26,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1031 vanished before elimination [2021-06-05 14:22:26,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:26,173 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,230 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 [2021-06-05 14:22:26,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,234 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 [2021-06-05 14:22:26,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,286 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 10 treesize of output 5 [2021-06-05 14:22:26,286 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,289 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 [2021-06-05 14:22:26,290 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,346 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 [2021-06-05 14:22:26,346 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:26,349 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 [2021-06-05 14:22:26,350 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:26,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:26,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:26,402 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:63 [2021-06-05 14:22:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796327378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:26,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:26,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:22:26,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099286309] [2021-06-05 14:22:26,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:26,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:26,454 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) [2021-06-05 14:22:26,841 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-05 14:22:27,067 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:22:27,276 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 14:22:27,542 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106 [2021-06-05 14:22:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:27,638 INFO L93 Difference]: Finished difference Result 320 states and 919 transitions. [2021-06-05 14:22:27,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:27,638 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 [2021-06-05 14:22:27,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:27,639 INFO L225 Difference]: With dead ends: 320 [2021-06-05 14:22:27,639 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:22:27,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:22:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:22:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 221. [2021-06-05 14:22:27,641 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) [2021-06-05 14:22:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-05 14:22:27,641 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-05 14:22:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:27,642 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-05 14:22:27,642 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) [2021-06-05 14:22:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-05 14:22:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:27,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:27,642 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:27,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:27,842 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:27,843 INFO L82 PathProgramCache]: Analyzing trace with hash -324965886, now seen corresponding path program 111 times [2021-06-05 14:22:27,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:27,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664905333] [2021-06-05 14:22:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:28,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:28,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664905333] [2021-06-05 14:22:28,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664905333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:28,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394036946] [2021-06-05 14:22:28,130 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 [2021-06-05 14:22:28,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,291 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 17 treesize of output 13 [2021-06-05 14:22:28,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:28,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:28,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:28,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:28,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:28,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:28,374 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. [2021-06-05 14:22:28,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:203, output treesize:193 [2021-06-05 14:22:28,768 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 98 [2021-06-05 14:22:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,046 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 27 treesize of output 21 [2021-06-05 14:22:29,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:29,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,055 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 [2021-06-05 14:22:29,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,410 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2021-06-05 14:22:29,410 INFO L628 ElimStorePlain]: treesize reduction 188, result has 60.8 percent of original size [2021-06-05 14:22:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,416 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 11 treesize of output 3 [2021-06-05 14:22:29,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,514 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 19 treesize of output 15 [2021-06-05 14:22:29,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,520 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 21 treesize of output 17 [2021-06-05 14:22:29,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,613 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 12 treesize of output 5 [2021-06-05 14:22:29,614 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,619 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 11 treesize of output 3 [2021-06-05 14:22:29,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:22:29,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,790 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:29,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,795 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 27 treesize of output 21 [2021-06-05 14:22:29,796 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:29,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,886 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 10 treesize of output 5 [2021-06-05 14:22:29,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,892 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 20 treesize of output 9 [2021-06-05 14:22:29,892 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:29,990 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:29,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:29,995 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 30 treesize of output 24 [2021-06-05 14:22:29,996 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,082 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 7 treesize of output 5 [2021-06-05 14:22:30,083 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1058 vanished before elimination [2021-06-05 14:22:30,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,165 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 21 treesize of output 7 [2021-06-05 14:22:30,166 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:30,170 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 24 treesize of output 9 [2021-06-05 14:22:30,171 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:30,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:30,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:22:30,250 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:475, output treesize:82 [2021-06-05 14:22:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:30,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394036946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:30,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:30,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:22:30,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193471660] [2021-06-05 14:22:30,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:22:30,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:22:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:30,307 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) [2021-06-05 14:22:31,114 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 163 [2021-06-05 14:22:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:31,257 INFO L93 Difference]: Finished difference Result 266 states and 769 transitions. [2021-06-05 14:22:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:31,257 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 [2021-06-05 14:22:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:31,257 INFO L225 Difference]: With dead ends: 266 [2021-06-05 14:22:31,258 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:22:31,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1179.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:22:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-06-05 14:22:31,260 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) [2021-06-05 14:22:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-06-05 14:22:31,260 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 17 [2021-06-05 14:22:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:31,260 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-06-05 14:22:31,260 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) [2021-06-05 14:22:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-06-05 14:22:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:31,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:31,261 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:31,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 14:22:31,461 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1090703006, now seen corresponding path program 112 times [2021-06-05 14:22:31,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:31,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919338774] [2021-06-05 14:22:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:31,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:31,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919338774] [2021-06-05 14:22:31,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919338774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:31,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188861455] [2021-06-05 14:22:31,719 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 [2021-06-05 14:22:31,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:31,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:31,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:31,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:31,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:22:31,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:31,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:31,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:31,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:31,907 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 25 treesize of output 19 [2021-06-05 14:22:31,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:31,911 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 25 treesize of output 19 [2021-06-05 14:22:31,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:31,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:31,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:31,985 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:22:32,094 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]} [2021-06-05 14:22:32,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:32,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:32,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:32,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,303 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:22:32,304 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-05 14:22:32,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:32,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:32,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:32,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,409 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 30 treesize of output 24 [2021-06-05 14:22:32,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:32,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,418 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 30 treesize of output 24 [2021-06-05 14:22:32,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:32,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:32,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,571 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 14:22:32,571 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.7 percent of original size [2021-06-05 14:22:32,574 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 7 treesize of output 5 [2021-06-05 14:22:32,575 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,646 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 [2021-06-05 14:22:32,647 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,650 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 20 treesize of output 9 [2021-06-05 14:22:32,650 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,731 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 11 treesize of output 3 [2021-06-05 14:22:32,732 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,735 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 [2021-06-05 14:22:32,735 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,807 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,810 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 12 treesize of output 5 [2021-06-05 14:22:32,810 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,813 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 21 treesize of output 7 [2021-06-05 14:22:32,814 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,817 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 44 treesize of output 19 [2021-06-05 14:22:32,818 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:32,821 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,824 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 12 treesize of output 5 [2021-06-05 14:22:32,824 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:32,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:32,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:32,885 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:22:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:33,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188861455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:33,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:33,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943900167] [2021-06-05 14:22:33,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:33,038 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) [2021-06-05 14:22:33,615 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:22:33,876 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 14:22:34,091 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 14:22:34,296 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 14:22:34,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:34,362 INFO L93 Difference]: Finished difference Result 288 states and 822 transitions. [2021-06-05 14:22:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:22:34,362 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 [2021-06-05 14:22:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:34,363 INFO L225 Difference]: With dead ends: 288 [2021-06-05 14:22:34,363 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 14:22:34,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1516.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 14:22:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-06-05 14:22:34,365 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) [2021-06-05 14:22:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-05 14:22:34,365 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-05 14:22:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:34,366 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-05 14:22:34,366 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) [2021-06-05 14:22:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-05 14:22:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:34,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:34,366 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:34,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4203,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:34,566 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash 17617626, now seen corresponding path program 113 times [2021-06-05 14:22:34,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:34,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45715102] [2021-06-05 14:22:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:34,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:34,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45715102] [2021-06-05 14:22:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45715102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:34,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347870478] [2021-06-05 14:22:34,699 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 [2021-06-05 14:22:34,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:22:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:34,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,859 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 25 treesize of output 19 [2021-06-05 14:22:34,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,863 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 15 treesize of output 11 [2021-06-05 14:22:34,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,910 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 [2021-06-05 14:22:34,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:34,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:34,914 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 [2021-06-05 14:22:34,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:34,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:34,961 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. [2021-06-05 14:22:34,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:156, output treesize:146 [2021-06-05 14:22:35,106 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 36=[array_0]} [2021-06-05 14:22:35,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,111 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 35 treesize of output 27 [2021-06-05 14:22:35,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,118 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 19 treesize of output 15 [2021-06-05 14:22:35,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:35,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,130 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 28 treesize of output 22 [2021-06-05 14:22:35,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:35,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,143 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 29 treesize of output 23 [2021-06-05 14:22:35,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:35,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:35,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,156 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 [2021-06-05 14:22:35,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,162 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 35 treesize of output 27 [2021-06-05 14:22:35,163 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:35,168 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 38 treesize of output 30 [2021-06-05 14:22:35,169 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:35,451 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 84 [2021-06-05 14:22:35,451 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.0 percent of original size [2021-06-05 14:22:35,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,456 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 23 treesize of output 11 [2021-06-05 14:22:35,457 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,462 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 44 treesize of output 19 [2021-06-05 14:22:35,463 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:35,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:35,487 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,492 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 12 treesize of output 5 [2021-06-05 14:22:35,492 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,497 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 [2021-06-05 14:22:35,497 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,511 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 21 treesize of output 7 [2021-06-05 14:22:35,511 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,516 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 [2021-06-05 14:22:35,516 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,529 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 [2021-06-05 14:22:35,529 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:35,534 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:35,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,651 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 14:22:35,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:35,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:35,656 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:525, output treesize:233 [2021-06-05 14:22:35,811 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 14:22:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347870478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:35,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:35,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:22:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210808393] [2021-06-05 14:22:35,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:22:35,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:35,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:22:35,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:22:35,909 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) [2021-06-05 14:22:36,369 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 14:22:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:36,467 INFO L93 Difference]: Finished difference Result 269 states and 782 transitions. [2021-06-05 14:22:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:36,467 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 [2021-06-05 14:22:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:36,468 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:22:36,468 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 14:22:36,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 14:22:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 219. [2021-06-05 14:22:36,470 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) [2021-06-05 14:22:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:36,470 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:36,470 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) [2021-06-05 14:22:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:36,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:36,471 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:36,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4220 [2021-06-05 14:22:36,673 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash -574938828, now seen corresponding path program 114 times [2021-06-05 14:22:36,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:36,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013919766] [2021-06-05 14:22:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:36,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:36,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013919766] [2021-06-05 14:22:36,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013919766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:36,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438652956] [2021-06-05 14:22:36,869 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 [2021-06-05 14:22:36,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:22:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:37,039 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 15 treesize of output 11 [2021-06-05 14:22:37,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:37,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:37,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,086 INFO L628 ElimStorePlain]: treesize reduction 30, result has 72.7 percent of original size [2021-06-05 14:22:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:37,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,091 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 19 treesize of output 15 [2021-06-05 14:22:37,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,113 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-05 14:22:37,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:22:37,114 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:131, output treesize:49 [2021-06-05 14:22:37,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:22:37,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:22:37,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:37,179 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 19 treesize of output 15 [2021-06-05 14:22:37,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:37,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:37,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:37,193 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 27 treesize of output 21 [2021-06-05 14:22:37,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:37,213 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:22:37,213 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:37,213 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1076 vanished before elimination [2021-06-05 14:22:37,213 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1078 vanished before elimination [2021-06-05 14:22:37,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:37,214 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:102, output treesize:26 [2021-06-05 14:22:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438652956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:37,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:37,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:37,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344204120] [2021-06-05 14:22:37,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:37,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:37,242 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) [2021-06-05 14:22:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:37,706 INFO L93 Difference]: Finished difference Result 265 states and 766 transitions. [2021-06-05 14:22:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:22:37,707 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 [2021-06-05 14:22:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:37,707 INFO L225 Difference]: With dead ends: 265 [2021-06-05 14:22:37,707 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:22:37,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:22:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-06-05 14:22:37,709 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) [2021-06-05 14:22:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-05 14:22:37,710 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-05 14:22:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:37,710 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-05 14:22:37,710 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) [2021-06-05 14:22:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-05 14:22:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:37,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:37,710 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:37,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4256,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:37,911 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash 906299042, now seen corresponding path program 115 times [2021-06-05 14:22:37,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:37,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656351028] [2021-06-05 14:22:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:38,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:38,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656351028] [2021-06-05 14:22:38,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656351028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:38,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135297645] [2021-06-05 14:22:38,144 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 [2021-06-05 14:22:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:38,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:22:38,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:38,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,260 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 [2021-06-05 14:22:38,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:38,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:38,324 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-06-05 14:22:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,479 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 30 treesize of output 24 [2021-06-05 14:22:38,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,484 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 25 treesize of output 19 [2021-06-05 14:22:38,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:38,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,495 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 15 treesize of output 11 [2021-06-05 14:22:38,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:38,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,505 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 28 treesize of output 22 [2021-06-05 14:22:38,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,511 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 30 treesize of output 24 [2021-06-05 14:22:38,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,516 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 27 treesize of output 21 [2021-06-05 14:22:38,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:38,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,522 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 [2021-06-05 14:22:38,523 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,528 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 28 treesize of output 22 [2021-06-05 14:22:38,529 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,534 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 30 treesize of output 24 [2021-06-05 14:22:38,534 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,539 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 46 treesize of output 36 [2021-06-05 14:22:38,540 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,545 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 28 treesize of output 22 [2021-06-05 14:22:38,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,550 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 48 treesize of output 38 [2021-06-05 14:22:38,551 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,754 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 14:22:38,754 INFO L628 ElimStorePlain]: treesize reduction 228, result has 56.2 percent of original size [2021-06-05 14:22:38,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,758 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 12 treesize of output 5 [2021-06-05 14:22:38,759 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,763 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 10 treesize of output 5 [2021-06-05 14:22:38,764 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,767 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 [2021-06-05 14:22:38,768 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,779 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 [2021-06-05 14:22:38,780 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:38,784 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:38,789 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,800 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 [2021-06-05 14:22:38,801 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:38,805 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:38,808 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 44 treesize of output 19 [2021-06-05 14:22:38,809 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:38,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:38,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:38,890 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-06-05 14:22:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:39,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135297645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:39,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:39,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 14:22:39,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723843517] [2021-06-05 14:22:39,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:39,047 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) [2021-06-05 14:22:39,390 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 14:22:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:39,538 INFO L93 Difference]: Finished difference Result 269 states and 768 transitions. [2021-06-05 14:22:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:39,538 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 [2021-06-05 14:22:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:39,539 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:22:39,539 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 14:22:39,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:22:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 14:22:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-06-05 14:22:39,541 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) [2021-06-05 14:22:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 669 transitions. [2021-06-05 14:22:39,541 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 669 transitions. Word has length 17 [2021-06-05 14:22:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:39,541 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 669 transitions. [2021-06-05 14:22:39,541 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) [2021-06-05 14:22:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 669 transitions. [2021-06-05 14:22:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:39,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:39,542 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:39,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:39,743 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash -764676974, now seen corresponding path program 116 times [2021-06-05 14:22:39,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:39,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47145554] [2021-06-05 14:22:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:39,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47145554] [2021-06-05 14:22:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47145554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721374948] [2021-06-05 14:22:39,937 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 [2021-06-05 14:22:39,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:39,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:39,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:40,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:40,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,124 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 15 treesize of output 11 [2021-06-05 14:22:40,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,128 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 27 treesize of output 21 [2021-06-05 14:22:40,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:40,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:40,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:40,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:40,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,211 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-05 14:22:40,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:40,212 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-05 14:22:40,291 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 28 treesize of output 22 [2021-06-05 14:22:40,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,294 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 19 treesize of output 15 [2021-06-05 14:22:40,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:40,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:22:40,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,337 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-06-05 14:22:40,337 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1081 vanished before elimination [2021-06-05 14:22:40,337 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:22:40,337 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:40,339 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 19 treesize of output 15 [2021-06-05 14:22:40,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:40,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:40,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1080 vanished before elimination [2021-06-05 14:22:40,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:40,354 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-05 14:22:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:40,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721374948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:40,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:40,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:40,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583962486] [2021-06-05 14:22:40,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:40,386 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) [2021-06-05 14:22:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:41,080 INFO L93 Difference]: Finished difference Result 269 states and 760 transitions. [2021-06-05 14:22:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:41,080 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 [2021-06-05 14:22:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:41,080 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:22:41,081 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:22:41,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:22:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 219. [2021-06-05 14:22:41,083 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) [2021-06-05 14:22:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:41,083 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:41,083 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:41,083 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) [2021-06-05 14:22:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:41,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:41,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:41,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:41,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4296 [2021-06-05 14:22:41,284 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1455215452, now seen corresponding path program 117 times [2021-06-05 14:22:41,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:41,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311590063] [2021-06-05 14:22:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:41,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311590063] [2021-06-05 14:22:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311590063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047586381] [2021-06-05 14:22:41,533 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 [2021-06-05 14:22:41,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:41,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:41,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,668 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 [2021-06-05 14:22:41,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,671 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 15 treesize of output 11 [2021-06-05 14:22:41,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:41,675 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 35 treesize of output 27 [2021-06-05 14:22:41,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:41,679 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 [2021-06-05 14:22:41,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:41,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:41,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:41,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:195, output treesize:251 [2021-06-05 14:22:41,976 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 27 treesize of output 21 [2021-06-05 14:22:41,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:42,032 INFO L628 ElimStorePlain]: treesize reduction 114, result has 47.0 percent of original size [2021-06-05 14:22:42,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:42,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:42,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:42,060 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1083 vanished before elimination [2021-06-05 14:22:42,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:42,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,065 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 27 treesize of output 21 [2021-06-05 14:22:42,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:42,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:42,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1085 vanished before elimination [2021-06-05 14:22:42,087 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:42,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:42,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:228, output treesize:52 [2021-06-05 14:22:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047586381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:42,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:42,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:42,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912305996] [2021-06-05 14:22:42,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:42,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:42,134 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) [2021-06-05 14:22:42,566 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 14:22:42,812 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 14:22:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:42,896 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-06-05 14:22:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:42,897 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 [2021-06-05 14:22:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:42,897 INFO L225 Difference]: With dead ends: 259 [2021-06-05 14:22:42,897 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 14:22:42,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1037.8ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:22:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 14:22:42,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2021-06-05 14:22:42,899 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) [2021-06-05 14:22:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-05 14:22:42,900 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-05 14:22:42,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:42,900 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-05 14:22:42,900 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) [2021-06-05 14:22:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-05 14:22:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:42,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:42,900 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:43,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:43,101 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 640409298, now seen corresponding path program 118 times [2021-06-05 14:22:43,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:43,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974616214] [2021-06-05 14:22:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:43,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:43,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974616214] [2021-06-05 14:22:43,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974616214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:43,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166264094] [2021-06-05 14:22:43,343 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 [2021-06-05 14:22:43,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:22:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:43,464 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 15 treesize of output 11 [2021-06-05 14:22:43,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,467 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 [2021-06-05 14:22:43,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:43,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:43,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:43,512 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 25 treesize of output 19 [2021-06-05 14:22:43,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:43,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:43,553 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:156, output treesize:146 [2021-06-05 14:22:43,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,640 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 [2021-06-05 14:22:43,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:43,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 14:22:43,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,650 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 35 treesize of output 27 [2021-06-05 14:22:43,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:43,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,656 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 [2021-06-05 14:22:43,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,661 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 19 treesize of output 15 [2021-06-05 14:22:43,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,665 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 29 treesize of output 23 [2021-06-05 14:22:43,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:43,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,670 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 28 treesize of output 22 [2021-06-05 14:22:43,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,675 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 [2021-06-05 14:22:43,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,680 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 [2021-06-05 14:22:43,681 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,684 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 [2021-06-05 14:22:43,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,858 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-05 14:22:43,858 INFO L628 ElimStorePlain]: treesize reduction 363, result has 38.3 percent of original size [2021-06-05 14:22:43,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,861 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 20 treesize of output 9 [2021-06-05 14:22:43,862 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:43,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,876 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 21 treesize of output 7 [2021-06-05 14:22:43,876 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,879 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 [2021-06-05 14:22:43,880 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,890 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 12 treesize of output 5 [2021-06-05 14:22:43,890 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:43,893 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 [2021-06-05 14:22:43,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:43,897 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:43,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:43,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:22:43,959 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:425, output treesize:146 [2021-06-05 14:22:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:44,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166264094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:44,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:44,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:44,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213831929] [2021-06-05 14:22:44,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:44,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:44,127 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) [2021-06-05 14:22:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:44,561 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-06-05 14:22:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:22:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:22:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:44,561 INFO L225 Difference]: With dead ends: 256 [2021-06-05 14:22:44,562 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 14:22:44,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:22:44,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 14:22:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-06-05 14:22:44,564 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) [2021-06-05 14:22:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:44,564 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:44,564 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:44,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:22:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:44,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:44,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:44,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4338,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:44,765 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1662308434, now seen corresponding path program 119 times [2021-06-05 14:22:44,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:44,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41491148] [2021-06-05 14:22:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:45,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:45,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41491148] [2021-06-05 14:22:45,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41491148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:45,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729057424] [2021-06-05 14:22:45,010 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 [2021-06-05 14:22:45,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:22:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:22:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:45,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:45,159 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 [2021-06-05 14:22:45,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:45,163 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 15 treesize of output 11 [2021-06-05 14:22:45,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:45,167 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 25 treesize of output 19 [2021-06-05 14:22:45,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:45,171 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 35 treesize of output 27 [2021-06-05 14:22:45,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:45,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:45,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:45,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:201, output treesize:261 [2021-06-05 14:22:45,589 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]} [2021-06-05 14:22:45,596 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 25 treesize of output 19 [2021-06-05 14:22:45,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:45,603 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 [2021-06-05 14:22:45,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:45,910 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 88 [2021-06-05 14:22:45,911 INFO L628 ElimStorePlain]: treesize reduction 405, result has 49.6 percent of original size [2021-06-05 14:22:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:45,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:46,141 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-06-05 14:22:46,141 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.9 percent of original size [2021-06-05 14:22:46,146 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 19 treesize of output 15 [2021-06-05 14:22:46,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:46,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,329 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 14:22:46,330 INFO L628 ElimStorePlain]: treesize reduction 77, result has 78.6 percent of original size [2021-06-05 14:22:46,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:46,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:46,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,422 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1088 vanished before elimination [2021-06-05 14:22:46,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:22:46,427 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,431 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 21 treesize of output 17 [2021-06-05 14:22:46,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,436 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 21 treesize of output 17 [2021-06-05 14:22:46,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,524 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1100 vanished before elimination [2021-06-05 14:22:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:22:46,529 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1093 vanished before elimination [2021-06-05 14:22:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,613 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 [2021-06-05 14:22:46,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,617 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 20 treesize of output 9 [2021-06-05 14:22:46,618 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,707 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 21 treesize of output 7 [2021-06-05 14:22:46,708 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,711 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 11 treesize of output 3 [2021-06-05 14:22:46,712 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,803 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 12 treesize of output 5 [2021-06-05 14:22:46,804 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,807 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 44 treesize of output 19 [2021-06-05 14:22:46,808 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,811 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 12 treesize of output 5 [2021-06-05 14:22:46,811 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:46,888 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 [2021-06-05 14:22:46,889 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,891 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 [2021-06-05 14:22:46,892 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:46,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:46,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1101 vanished before elimination [2021-06-05 14:22:46,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1089 vanished before elimination [2021-06-05 14:22:46,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1091 vanished before elimination [2021-06-05 14:22:46,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:46,964 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:817, output treesize:168 [2021-06-05 14:22:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729057424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:22:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588459819] [2021-06-05 14:22:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:22:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:22:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:22:47,163 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) [2021-06-05 14:22:47,551 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 14:22:47,936 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-06-05 14:22:48,268 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:22:48,456 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:22:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:48,545 INFO L93 Difference]: Finished difference Result 281 states and 802 transitions. [2021-06-05 14:22:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:22:48,545 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 [2021-06-05 14:22:48,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:48,545 INFO L225 Difference]: With dead ends: 281 [2021-06-05 14:22:48,545 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 14:22:48,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1755.2ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:22:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 14:22:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2021-06-05 14:22:48,548 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) [2021-06-05 14:22:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-05 14:22:48,548 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-05 14:22:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:48,548 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-05 14:22:48,548 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) [2021-06-05 14:22:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-05 14:22:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:48,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:48,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:48,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4360 [2021-06-05 14:22:48,749 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2004891946, now seen corresponding path program 120 times [2021-06-05 14:22:48,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:48,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076915516] [2021-06-05 14:22:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:48,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076915516] [2021-06-05 14:22:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076915516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595327165] [2021-06-05 14:22:48,881 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 [2021-06-05 14:22:48,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:22:48,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:48,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:48,976 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 27 treesize of output 21 [2021-06-05 14:22:48,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:48,979 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 [2021-06-05 14:22:48,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:48,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:48,985 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 17 treesize of output 13 [2021-06-05 14:22:48,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:49,015 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:113 [2021-06-05 14:22:49,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,091 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 38 treesize of output 30 [2021-06-05 14:22:49,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,095 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 35 treesize of output 27 [2021-06-05 14:22:49,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:49,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,101 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 [2021-06-05 14:22:49,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:49,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,109 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 29 treesize of output 23 [2021-06-05 14:22:49,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:49,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,114 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 [2021-06-05 14:22:49,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,118 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 27 treesize of output 21 [2021-06-05 14:22:49,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:49,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:49,123 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:49,127 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,130 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 28 treesize of output 22 [2021-06-05 14:22:49,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,260 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 14:22:49,260 INFO L628 ElimStorePlain]: treesize reduction 236, result has 45.7 percent of original size [2021-06-05 14:22:49,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,264 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 [2021-06-05 14:22:49,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,267 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 [2021-06-05 14:22:49,268 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:49,279 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,281 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 20 treesize of output 9 [2021-06-05 14:22:49,282 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,292 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 [2021-06-05 14:22:49,292 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:49,295 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 [2021-06-05 14:22:49,296 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,305 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 11 treesize of output 3 [2021-06-05 14:22:49,306 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:49,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:49,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:49,357 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:397, output treesize:125 [2021-06-05 14:22:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:49,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595327165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:49,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:49,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 14:22:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36783175] [2021-06-05 14:22:49,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:22:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:22:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:49,483 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) [2021-06-05 14:22:49,915 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:22:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:49,971 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-06-05 14:22:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:22:49,971 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 [2021-06-05 14:22:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:49,972 INFO L225 Difference]: With dead ends: 256 [2021-06-05 14:22:49,972 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 14:22:49,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 14:22:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-06-05 14:22:49,974 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) [2021-06-05 14:22:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:49,974 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:49,974 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:49,974 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) [2021-06-05 14:22:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:49,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:49,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:50,181 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 569417172, now seen corresponding path program 121 times [2021-06-05 14:22:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255185402] [2021-06-05 14:22:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:50,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255185402] [2021-06-05 14:22:50,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255185402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359594869] [2021-06-05 14:22:50,410 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 [2021-06-05 14:22:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:50,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:50,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:50,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:50,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:50,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:22:50,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,531 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 17 treesize of output 13 [2021-06-05 14:22:50,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:50,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-05 14:22:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,646 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 27 treesize of output 21 [2021-06-05 14:22:50,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:50,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,650 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 [2021-06-05 14:22:50,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,654 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 28 treesize of output 22 [2021-06-05 14:22:50,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:50,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,658 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 35 treesize of output 27 [2021-06-05 14:22:50,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:50,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,663 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 37 treesize of output 29 [2021-06-05 14:22:50,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:50,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:50,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,673 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 18 treesize of output 14 [2021-06-05 14:22:50,674 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,677 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 27 treesize of output 21 [2021-06-05 14:22:50,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,682 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 25 treesize of output 19 [2021-06-05 14:22:50,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,686 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 15 treesize of output 11 [2021-06-05 14:22:50,686 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,837 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 14:22:50,837 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-05 14:22:50,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:22:50,841 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,844 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 20 treesize of output 9 [2021-06-05 14:22:50,845 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,848 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 [2021-06-05 14:22:50,848 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,851 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 11 treesize of output 3 [2021-06-05 14:22:50,852 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,863 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 12 treesize of output 5 [2021-06-05 14:22:50,864 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,867 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 44 treesize of output 19 [2021-06-05 14:22:50,867 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:50,871 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:50,883 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 21 treesize of output 7 [2021-06-05 14:22:50,883 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,886 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 11 treesize of output 3 [2021-06-05 14:22:50,886 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:50,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:50,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:50,954 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-05 14:22:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359594869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:51,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:51,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382662664] [2021-06-05 14:22:51,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:51,085 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) [2021-06-05 14:22:51,532 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 14:22:51,682 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 14:22:51,858 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 14:22:52,119 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 14:22:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:52,158 INFO L93 Difference]: Finished difference Result 288 states and 828 transitions. [2021-06-05 14:22:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:22:52,158 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 [2021-06-05 14:22:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:52,158 INFO L225 Difference]: With dead ends: 288 [2021-06-05 14:22:52,158 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 14:22:52,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1196.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:22:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 14:22:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-06-05 14:22:52,161 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) [2021-06-05 14:22:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-05 14:22:52,161 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-05 14:22:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:52,161 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-05 14:22:52,161 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) [2021-06-05 14:22:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-05 14:22:52,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:52,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:52,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:52,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4414,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:52,362 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash -245388982, now seen corresponding path program 122 times [2021-06-05 14:22:52,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:52,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704077657] [2021-06-05 14:22:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:52,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:52,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704077657] [2021-06-05 14:22:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704077657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:52,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877554834] [2021-06-05 14:22:52,609 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 [2021-06-05 14:22:52,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:22:52,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:52,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:52,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:52,736 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 [2021-06-05 14:22:52,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,739 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 [2021-06-05 14:22:52,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,743 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 19 treesize of output 15 [2021-06-05 14:22:52,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:22:52,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:52,786 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. [2021-06-05 14:22:52,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:123 [2021-06-05 14:22:52,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,903 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 27 treesize of output 21 [2021-06-05 14:22:52,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:52,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,909 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 [2021-06-05 14:22:52,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,915 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 25 treesize of output 19 [2021-06-05 14:22:52,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,920 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 15 treesize of output 11 [2021-06-05 14:22:52,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,926 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 19 treesize of output 15 [2021-06-05 14:22:52,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:22:52,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,937 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 17 treesize of output 13 [2021-06-05 14:22:52,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:52,942 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 17 treesize of output 13 [2021-06-05 14:22:52,942 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,148 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 14:22:53,149 INFO L628 ElimStorePlain]: treesize reduction 43, result has 87.0 percent of original size [2021-06-05 14:22:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,154 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 [2021-06-05 14:22:53,154 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:22:53,159 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,164 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 24 treesize of output 9 [2021-06-05 14:22:53,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:22:53,177 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:53,182 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:22:53,194 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,198 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 9 treesize of output 3 [2021-06-05 14:22:53,198 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,203 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 21 treesize of output 7 [2021-06-05 14:22:53,203 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:53,207 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 11 treesize of output 3 [2021-06-05 14:22:53,207 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:53,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:53,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:22:53,312 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:333, output treesize:152 [2021-06-05 14:22:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:53,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877554834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:53,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:53,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 14:22:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651652803] [2021-06-05 14:22:53,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:22:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:22:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:22:53,488 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) [2021-06-05 14:22:53,988 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:22:54,166 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:22:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:54,229 INFO L93 Difference]: Finished difference Result 274 states and 795 transitions. [2021-06-05 14:22:54,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:54,230 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 [2021-06-05 14:22:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:54,230 INFO L225 Difference]: With dead ends: 274 [2021-06-05 14:22:54,230 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 14:22:54,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 949.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:22:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 14:22:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 221. [2021-06-05 14:22:54,232 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) [2021-06-05 14:22:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-05 14:22:54,233 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-05 14:22:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:54,233 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-05 14:22:54,233 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) [2021-06-05 14:22:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-05 14:22:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:54,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:54,233 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:54,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-05 14:22:54,434 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 344982116, now seen corresponding path program 123 times [2021-06-05 14:22:54,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:54,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684759750] [2021-06-05 14:22:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:54,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:54,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684759750] [2021-06-05 14:22:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684759750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029218630] [2021-06-05 14:22:54,571 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 [2021-06-05 14:22:54,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:22:54,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:22:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:22:54,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,672 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 17 treesize of output 13 [2021-06-05 14:22:54,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,675 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 [2021-06-05 14:22:54,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,677 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 17 treesize of output 13 [2021-06-05 14:22:54,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:54,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:54,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:87, output treesize:59 [2021-06-05 14:22:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,772 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 [2021-06-05 14:22:54,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,776 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 19 treesize of output 15 [2021-06-05 14:22:54,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,779 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 15 treesize of output 11 [2021-06-05 14:22:54,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:54,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:54,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,787 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 29 treesize of output 23 [2021-06-05 14:22:54,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,791 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 17 treesize of output 13 [2021-06-05 14:22:54,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,795 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 27 treesize of output 21 [2021-06-05 14:22:54,796 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:54,798 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:54,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,907 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 14:22:54,907 INFO L628 ElimStorePlain]: treesize reduction 58, result has 75.9 percent of original size [2021-06-05 14:22:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,910 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 24 treesize of output 9 [2021-06-05 14:22:54,911 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,914 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 12 treesize of output 5 [2021-06-05 14:22:54,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,924 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 [2021-06-05 14:22:54,925 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,928 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 9 [2021-06-05 14:22:54,928 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:22:54,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:54,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:54,941 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 11 treesize of output 3 [2021-06-05 14:22:54,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:54,945 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:54,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:55,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:55,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:22:55,002 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:269, output treesize:115 [2021-06-05 14:22:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:55,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029218630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:55,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:55,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:22:55,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462804982] [2021-06-05 14:22:55,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:22:55,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:22:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:22:55,128 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) [2021-06-05 14:22:55,732 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:22:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:55,799 INFO L93 Difference]: Finished difference Result 308 states and 888 transitions. [2021-06-05 14:22:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:22:55,799 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 [2021-06-05 14:22:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:55,799 INFO L225 Difference]: With dead ends: 308 [2021-06-05 14:22:55,799 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:22:55,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 741.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:22:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:22:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 219. [2021-06-05 14:22:55,802 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) [2021-06-05 14:22:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-05 14:22:55,802 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-05 14:22:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-05 14:22:55,802 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) [2021-06-05 14:22:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-05 14:22:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:55,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:55,803 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:56,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-05 14:22:56,003 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash -109288126, now seen corresponding path program 124 times [2021-06-05 14:22:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:56,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434335155] [2021-06-05 14:22:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:56,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434335155] [2021-06-05 14:22:56,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434335155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:56,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461007845] [2021-06-05 14:22:56,270 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 [2021-06-05 14:22:56,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:22:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:56,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:56,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,409 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 35 treesize of output 27 [2021-06-05 14:22:56,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:22:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,414 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 15 treesize of output 11 [2021-06-05 14:22:56,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,417 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 [2021-06-05 14:22:56,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:56,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:56,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:22:56,585 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]} [2021-06-05 14:22:56,590 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 28 treesize of output 22 [2021-06-05 14:22:56,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:56,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:22:56,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,604 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 30 treesize of output 24 [2021-06-05 14:22:56,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,609 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 48 treesize of output 38 [2021-06-05 14:22:56,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:22:56,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:22:56,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,624 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 46 treesize of output 36 [2021-06-05 14:22:56,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,776 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-05 14:22:56,776 INFO L628 ElimStorePlain]: treesize reduction 180, result has 55.6 percent of original size [2021-06-05 14:22:56,780 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 [2021-06-05 14:22:56,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:56,843 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:56,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:56,910 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:56,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:56,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:22:56,982 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,985 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 11 treesize of output 3 [2021-06-05 14:22:56,985 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:56,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,061 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 12 treesize of output 5 [2021-06-05 14:22:57,062 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,065 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 [2021-06-05 14:22:57,066 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,069 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 21 treesize of output 7 [2021-06-05 14:22:57,069 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,072 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 12 treesize of output 5 [2021-06-05 14:22:57,073 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,075 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 44 treesize of output 19 [2021-06-05 14:22:57,076 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,137 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:22:57,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:57,140 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 10 treesize of output 5 [2021-06-05 14:22:57,141 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:22:57,144 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:57,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:57,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:22:57,213 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:22:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:57,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461007845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:57,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:22:57,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:22:57,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069390692] [2021-06-05 14:22:57,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:22:57,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:22:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:22:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:22:57,363 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) [2021-06-05 14:22:57,946 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-06-05 14:22:58,207 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 14:22:58,385 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 14:22:58,594 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-05 14:22:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:22:58,683 INFO L93 Difference]: Finished difference Result 302 states and 863 transitions. [2021-06-05 14:22:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:22:58,683 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 [2021-06-05 14:22:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:22:58,684 INFO L225 Difference]: With dead ends: 302 [2021-06-05 14:22:58,684 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 14:22:58,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1443.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:22:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 14:22:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 224. [2021-06-05 14:22:58,686 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) [2021-06-05 14:22:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-06-05 14:22:58,687 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-06-05 14:22:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:22:58,687 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-06-05 14:22:58,687 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) [2021-06-05 14:22:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-06-05 14:22:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:22:58,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:22:58,687 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:22:58,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4467,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:58,888 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:22:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:22:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash 233295386, now seen corresponding path program 125 times [2021-06-05 14:22:58,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:22:58,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103085825] [2021-06-05 14:22:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:22:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:22:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:22:59,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:22:59,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103085825] [2021-06-05 14:22:59,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103085825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:22:59,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52196121] [2021-06-05 14:22:59,021 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 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 [2021-06-05 14:22:59,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:22:59,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:22:59,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:22:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:22:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,154 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 17 treesize of output 13 [2021-06-05 14:22:59,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:22:59,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,163 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 15 treesize of output 11 [2021-06-05 14:22:59,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:22:59,166 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 27 treesize of output 21 [2021-06-05 14:22:59,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:59,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:22:59,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:22:59,347 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]} [2021-06-05 14:22:59,352 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 17 treesize of output 13 [2021-06-05 14:22:59,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,530 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2021-06-05 14:22:59,531 INFO L628 ElimStorePlain]: treesize reduction 88, result has 76.0 percent of original size [2021-06-05 14:22:59,535 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 7 treesize of output 5 [2021-06-05 14:22:59,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,688 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 14:22:59,688 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.4 percent of original size [2021-06-05 14:22:59,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:59,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:59,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:22:59,771 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1122 vanished before elimination [2021-06-05 14:22:59,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:22:59,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:22:59,938 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 14:22:59,939 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-06-05 14:22:59,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1124 vanished before elimination [2021-06-05 14:22:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:22:59,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:22:59,947 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 38 treesize of output 30 [2021-06-05 14:22:59,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:00,120 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 14:23:00,120 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.5 percent of original size [2021-06-05 14:23:00,124 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 28 treesize of output 22 [2021-06-05 14:23:00,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,128 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 19 treesize of output 15 [2021-06-05 14:23:00,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,209 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1119 vanished before elimination [2021-06-05 14:23:00,209 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:23:00,209 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1121 vanished before elimination [2021-06-05 14:23:00,209 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1123 vanished before elimination [2021-06-05 14:23:00,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,213 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 20 treesize of output 9 [2021-06-05 14:23:00,213 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,217 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 10 treesize of output 5 [2021-06-05 14:23:00,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,305 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 11 treesize of output 3 [2021-06-05 14:23:00,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,309 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 21 treesize of output 7 [2021-06-05 14:23:00,310 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,395 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 12 treesize of output 5 [2021-06-05 14:23:00,395 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,399 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 [2021-06-05 14:23:00,400 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,403 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 [2021-06-05 14:23:00,403 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:00,487 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:00,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:00,491 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:00,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:00,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:00,560 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 16 variables, input treesize:374, output treesize:161 [2021-06-05 14:23:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:00,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52196121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:00,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:00,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:23:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697978901] [2021-06-05 14:23:00,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:00,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:00,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:00,731 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) [2021-06-05 14:23:01,225 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 14:23:01,403 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 14:23:01,705 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:23:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:01,744 INFO L93 Difference]: Finished difference Result 285 states and 824 transitions. [2021-06-05 14:23:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:01,744 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 [2021-06-05 14:23:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:01,745 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:23:01,745 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 14:23:01,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 14:23:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 224. [2021-06-05 14:23:01,747 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) [2021-06-05 14:23:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-06-05 14:23:01,747 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-06-05 14:23:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:01,747 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-06-05 14:23:01,747 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) [2021-06-05 14:23:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-06-05 14:23:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:01,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:01,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:01,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-05 14:23:01,953 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1313469832, now seen corresponding path program 126 times [2021-06-05 14:23:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816669878] [2021-06-05 14:23:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:02,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816669878] [2021-06-05 14:23:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816669878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949463424] [2021-06-05 14:23:02,135 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 [2021-06-05 14:23:02,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:23:02,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:02,332 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 25 treesize of output 19 [2021-06-05 14:23:02,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:02,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:02,401 INFO L628 ElimStorePlain]: treesize reduction 52, result has 61.5 percent of original size [2021-06-05 14:23:02,403 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 17 treesize of output 13 [2021-06-05 14:23:02,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,428 INFO L628 ElimStorePlain]: treesize reduction 26, result has 65.8 percent of original size [2021-06-05 14:23:02,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:23:02,429 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:131, output treesize:50 [2021-06-05 14:23:02,466 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 [2021-06-05 14:23:02,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:02,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,489 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:23:02,491 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 [2021-06-05 14:23:02,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,494 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 [2021-06-05 14:23:02,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:02,510 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1126 vanished before elimination [2021-06-05 14:23:02,512 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 17 treesize of output 13 [2021-06-05 14:23:02,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:02,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:02,534 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 14:23:02,534 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1128 vanished before elimination [2021-06-05 14:23:02,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:02,534 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:104, output treesize:26 [2021-06-05 14:23:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:02,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949463424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:02,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:02,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:23:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015007666] [2021-06-05 14:23:02,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:02,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:02,569 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) [2021-06-05 14:23:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:03,440 INFO L93 Difference]: Finished difference Result 332 states and 941 transitions. [2021-06-05 14:23:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:23:03,440 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 [2021-06-05 14:23:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:03,441 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:23:03,441 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 14:23:03,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 901.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 14:23:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 226. [2021-06-05 14:23:03,443 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) [2021-06-05 14:23:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-06-05 14:23:03,443 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-06-05 14:23:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:03,444 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-06-05 14:23:03,444 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) [2021-06-05 14:23:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-06-05 14:23:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:03,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:03,444 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:03,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4514,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:03,645 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1873488734, now seen corresponding path program 127 times [2021-06-05 14:23:03,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:03,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908597735] [2021-06-05 14:23:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:03,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:03,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908597735] [2021-06-05 14:23:03,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908597735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:03,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573777745] [2021-06-05 14:23:03,794 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 [2021-06-05 14:23:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,882 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 [2021-06-05 14:23:03,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:03,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,886 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 [2021-06-05 14:23:03,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:03,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:03,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:03,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:03,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:03,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:03,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:03,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:03,932 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-05 14:23:04,083 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]} [2021-06-05 14:23:04,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:23:04,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:04,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:04,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:04,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,101 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 38 treesize of output 30 [2021-06-05 14:23:04,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:04,301 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:23:04,301 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-06-05 14:23:04,306 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 17 treesize of output 13 [2021-06-05 14:23:04,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:04,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:04,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,414 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 7 treesize of output 5 [2021-06-05 14:23:04,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,584 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 14:23:04,584 INFO L628 ElimStorePlain]: treesize reduction 26, result has 91.7 percent of original size [2021-06-05 14:23:04,587 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 27 treesize of output 21 [2021-06-05 14:23:04,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:04,751 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 14:23:04,751 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.0 percent of original size [2021-06-05 14:23:04,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,755 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 12 treesize of output 5 [2021-06-05 14:23:04,756 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,760 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 44 treesize of output 19 [2021-06-05 14:23:04,761 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,774 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 12 treesize of output 5 [2021-06-05 14:23:04,775 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,779 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 11 treesize of output 3 [2021-06-05 14:23:04,780 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,783 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 21 treesize of output 7 [2021-06-05 14:23:04,783 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,862 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 [2021-06-05 14:23:04,862 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:23:04,866 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:04,944 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1132 vanished before elimination [2021-06-05 14:23:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,947 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 21 treesize of output 7 [2021-06-05 14:23:04,948 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:04,951 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 11 treesize of output 3 [2021-06-05 14:23:04,951 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:04,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:05,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:05,027 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-05 14:23:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:05,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573777745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:05,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:05,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:23:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673230513] [2021-06-05 14:23:05,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:05,198 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) [2021-06-05 14:23:05,688 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 14:23:05,947 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 14:23:06,242 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-05 14:23:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:06,282 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-05 14:23:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:06,283 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 [2021-06-05 14:23:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:06,283 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:23:06,283 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 14:23:06,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1197.7ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 14:23:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 225. [2021-06-05 14:23:06,286 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) [2021-06-05 14:23:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 670 transitions. [2021-06-05 14:23:06,286 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 670 transitions. Word has length 17 [2021-06-05 14:23:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:06,286 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 670 transitions. [2021-06-05 14:23:06,286 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) [2021-06-05 14:23:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 670 transitions. [2021-06-05 14:23:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:06,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:06,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:06,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4540 [2021-06-05 14:23:06,487 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash -684833076, now seen corresponding path program 128 times [2021-06-05 14:23:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:06,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554760820] [2021-06-05 14:23:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:06,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554760820] [2021-06-05 14:23:06,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554760820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239811980] [2021-06-05 14:23:06,747 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 [2021-06-05 14:23:06,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:06,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:06,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:06,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,873 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 [2021-06-05 14:23:06,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:06,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:06,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:06,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:06,883 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 35 treesize of output 27 [2021-06-05 14:23:06,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:23:06,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:06,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:06,935 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-05 14:23:07,109 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-05 14:23:07,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:23:07,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:07,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,121 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 30 treesize of output 24 [2021-06-05 14:23:07,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,125 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 30 treesize of output 24 [2021-06-05 14:23:07,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,130 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 17 treesize of output 13 [2021-06-05 14:23:07,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,134 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 [2021-06-05 14:23:07,135 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:07,138 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 28 treesize of output 22 [2021-06-05 14:23:07,139 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,143 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 46 treesize of output 36 [2021-06-05 14:23:07,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:23:07,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:07,152 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:23:07,156 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:07,160 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,164 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 [2021-06-05 14:23:07,165 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 14:23:07,169 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,318 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 14:23:07,318 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-06-05 14:23:07,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,322 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 12 treesize of output 5 [2021-06-05 14:23:07,323 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,326 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 [2021-06-05 14:23:07,326 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,329 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 [2021-06-05 14:23:07,330 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,333 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 21 treesize of output 7 [2021-06-05 14:23:07,334 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,337 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 11 treesize of output 3 [2021-06-05 14:23:07,337 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:07,348 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,351 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 10 treesize of output 5 [2021-06-05 14:23:07,351 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:23:07,355 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:07,364 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 44 treesize of output 19 [2021-06-05 14:23:07,365 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:07,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:07,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:23:07,426 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-06-05 14:23:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239811980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:07,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:07,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:23:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54303894] [2021-06-05 14:23:07,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:07,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:07,579 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) [2021-06-05 14:23:08,011 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-05 14:23:08,329 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2021-06-05 14:23:08,834 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-06-05 14:23:09,367 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-06-05 14:23:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:09,413 INFO L93 Difference]: Finished difference Result 375 states and 1083 transitions. [2021-06-05 14:23:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:09,414 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 [2021-06-05 14:23:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:09,414 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:23:09,414 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:23:09,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2062.6ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:23:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:23:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 229. [2021-06-05 14:23:09,418 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) [2021-06-05 14:23:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-06-05 14:23:09,419 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-06-05 14:23:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:09,419 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-06-05 14:23:09,419 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) [2021-06-05 14:23:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-06-05 14:23:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:09,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:09,420 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4566 [2021-06-05 14:23:09,643 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 590115602, now seen corresponding path program 129 times [2021-06-05 14:23:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890204456] [2021-06-05 14:23:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:09,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:09,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890204456] [2021-06-05 14:23:09,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890204456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:09,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323895906] [2021-06-05 14:23:09,871 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 [2021-06-05 14:23:09,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:23:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:23:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:10,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,062 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 27 treesize of output 21 [2021-06-05 14:23:10,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,068 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 17 treesize of output 13 [2021-06-05 14:23:10,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,073 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 [2021-06-05 14:23:10,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,078 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 [2021-06-05 14:23:10,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,144 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. [2021-06-05 14:23:10,144 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:197, output treesize:187 [2021-06-05 14:23:10,498 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]} [2021-06-05 14:23:10,504 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 [2021-06-05 14:23:10,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,510 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 15 treesize of output 11 [2021-06-05 14:23:10,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,669 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2021-06-05 14:23:10,669 INFO L628 ElimStorePlain]: treesize reduction 136, result has 61.7 percent of original size [2021-06-05 14:23:10,674 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 30 treesize of output 24 [2021-06-05 14:23:10,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,680 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 28 treesize of output 22 [2021-06-05 14:23:10,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:10,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:10,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:23:10,809 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:10,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,883 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 [2021-06-05 14:23:10,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,941 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 7 treesize of output 5 [2021-06-05 14:23:10,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:10,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:10,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:10,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,000 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 [2021-06-05 14:23:11,000 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,004 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 20 treesize of output 9 [2021-06-05 14:23:11,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,069 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 21 treesize of output 7 [2021-06-05 14:23:11,069 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,073 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 24 treesize of output 9 [2021-06-05 14:23:11,074 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1142 vanished before elimination [2021-06-05 14:23:11,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,128 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 [2021-06-05 14:23:11,128 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,132 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 12 treesize of output 5 [2021-06-05 14:23:11,133 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:11,186 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 [2021-06-05 14:23:11,186 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:11,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:11,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1149 vanished before elimination [2021-06-05 14:23:11,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:23:11,237 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:369, output treesize:62 [2021-06-05 14:23:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:11,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323895906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:11,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:11,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:23:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440260924] [2021-06-05 14:23:11,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:11,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:11,286 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) [2021-06-05 14:23:11,674 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-06-05 14:23:11,980 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 119 [2021-06-05 14:23:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:12,133 INFO L93 Difference]: Finished difference Result 321 states and 933 transitions. [2021-06-05 14:23:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:12,134 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 [2021-06-05 14:23:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:12,134 INFO L225 Difference]: With dead ends: 321 [2021-06-05 14:23:12,134 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:23:12,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1008.9ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:23:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 233. [2021-06-05 14:23:12,137 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) [2021-06-05 14:23:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-06-05 14:23:12,137 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-06-05 14:23:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:12,137 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-06-05 14:23:12,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:23:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-06-05 14:23:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:12,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:12,138 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:12,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4583 [2021-06-05 14:23:12,338 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2005784494, now seen corresponding path program 130 times [2021-06-05 14:23:12,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:12,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366919572] [2021-06-05 14:23:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:12,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366919572] [2021-06-05 14:23:12,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366919572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759035270] [2021-06-05 14:23:12,545 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 [2021-06-05 14:23:12,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:12,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:12,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,699 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 [2021-06-05 14:23:12,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:23:12,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:23:12,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:12,707 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 25 treesize of output 19 [2021-06-05 14:23:12,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:12,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:12,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-06-05 14:23:12,880 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]} [2021-06-05 14:23:12,884 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 48 treesize of output 38 [2021-06-05 14:23:12,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,896 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 30 treesize of output 24 [2021-06-05 14:23:12,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:12,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,906 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 30 treesize of output 24 [2021-06-05 14:23:12,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,920 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 46 treesize of output 36 [2021-06-05 14:23:12,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,926 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 28 treesize of output 22 [2021-06-05 14:23:12,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,932 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 [2021-06-05 14:23:12,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:12,937 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 28 treesize of output 22 [2021-06-05 14:23:12,938 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,113 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 14:23:13,114 INFO L628 ElimStorePlain]: treesize reduction 257, result has 49.2 percent of original size [2021-06-05 14:23:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:13,118 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:13,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,198 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 7 treesize of output 5 [2021-06-05 14:23:13,199 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,278 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 [2021-06-05 14:23:13,279 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:13,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,371 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 10 treesize of output 5 [2021-06-05 14:23:13,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,375 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 20 treesize of output 9 [2021-06-05 14:23:13,376 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:23:13,468 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,472 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 11 treesize of output 3 [2021-06-05 14:23:13,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,477 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 44 treesize of output 19 [2021-06-05 14:23:13,478 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:13,483 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,487 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 12 treesize of output 5 [2021-06-05 14:23:13,488 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,562 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1156 vanished before elimination [2021-06-05 14:23:13,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,566 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 11 treesize of output 3 [2021-06-05 14:23:13,567 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:13,570 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 21 treesize of output 7 [2021-06-05 14:23:13,571 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:13,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:13,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:23:13,649 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-05 14:23:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:13,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759035270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:13,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:13,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:23:13,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583611878] [2021-06-05 14:23:13,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:13,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:13,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:13,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:13,821 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) [2021-06-05 14:23:14,313 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-05 14:23:14,584 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 14:23:14,897 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 14:23:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:14,939 INFO L93 Difference]: Finished difference Result 344 states and 985 transitions. [2021-06-05 14:23:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:14,940 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 [2021-06-05 14:23:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:14,940 INFO L225 Difference]: With dead ends: 344 [2021-06-05 14:23:14,940 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:23:14,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1293.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:23:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:23:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 233. [2021-06-05 14:23:14,943 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) [2021-06-05 14:23:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-06-05 14:23:14,943 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-06-05 14:23:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:14,943 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-06-05 14:23:14,943 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) [2021-06-05 14:23:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-06-05 14:23:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:14,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:14,944 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:15,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4623,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:15,144 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1746863934, now seen corresponding path program 131 times [2021-06-05 14:23:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:15,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229028804] [2021-06-05 14:23:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:15,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:15,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229028804] [2021-06-05 14:23:15,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229028804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:15,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688215650] [2021-06-05 14:23:15,362 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 [2021-06-05 14:23:15,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:15,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:15,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,538 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 15 treesize of output 11 [2021-06-05 14:23:15,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:15,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,553 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 27 treesize of output 21 [2021-06-05 14:23:15,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:15,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:23:15,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:15,614 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. [2021-06-05 14:23:15,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:177, output treesize:167 [2021-06-05 14:23:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,826 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 19 treesize of output 15 [2021-06-05 14:23:15,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,832 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 28 treesize of output 22 [2021-06-05 14:23:15,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,839 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 29 treesize of output 23 [2021-06-05 14:23:15,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:15,845 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 [2021-06-05 14:23:15,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:16,085 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-05 14:23:16,086 INFO L628 ElimStorePlain]: treesize reduction 98, result has 78.7 percent of original size [2021-06-05 14:23:16,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:16,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:16,096 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 17 treesize of output 13 [2021-06-05 14:23:16,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,206 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 14:23:16,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,212 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 12 treesize of output 5 [2021-06-05 14:23:16,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,217 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 24 treesize of output 9 [2021-06-05 14:23:16,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:16,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,236 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 46 treesize of output 15 [2021-06-05 14:23:16,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-06-05 14:23:16,242 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:16,259 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,363 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 14:23:16,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,368 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 7 treesize of output 5 [2021-06-05 14:23:16,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,477 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 14:23:16,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:16,483 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,488 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 11 treesize of output 3 [2021-06-05 14:23:16,501 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 14:23:16,518 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,641 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 14:23:16,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,641 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1164 vanished before elimination [2021-06-05 14:23:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:16,647 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:16,771 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 14:23:16,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:23:16,778 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,782 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 10 treesize of output 5 [2021-06-05 14:23:16,783 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:16,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,915 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 14:23:16,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:16,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:23:16,921 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:170 [2021-06-05 14:23:17,107 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:23:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:17,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688215650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:17,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:17,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 14:23:17,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325673936] [2021-06-05 14:23:17,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:17,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:17,186 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) [2021-06-05 14:23:17,946 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 14:23:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:18,020 INFO L93 Difference]: Finished difference Result 336 states and 971 transitions. [2021-06-05 14:23:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:18,020 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 [2021-06-05 14:23:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:18,021 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:23:18,021 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:23:18,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1098.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:23:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2021-06-05 14:23:18,023 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) [2021-06-05 14:23:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-06-05 14:23:18,024 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 17 [2021-06-05 14:23:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:18,024 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-06-05 14:23:18,024 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) [2021-06-05 14:23:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-06-05 14:23:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:18,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:18,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:18,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4641,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:18,225 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 932699114, now seen corresponding path program 132 times [2021-06-05 14:23:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:18,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270596452] [2021-06-05 14:23:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:18,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270596452] [2021-06-05 14:23:18,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270596452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769634210] [2021-06-05 14:23:18,359 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 [2021-06-05 14:23:18,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:23:18,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:18,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:18,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:18,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,503 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 17 treesize of output 13 [2021-06-05 14:23:18,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,507 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 [2021-06-05 14:23:18,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,511 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 15 treesize of output 11 [2021-06-05 14:23:18,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:18,515 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 [2021-06-05 14:23:18,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:18,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:18,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:18,562 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-05 14:23:18,651 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]} [2021-06-05 14:23:18,656 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 25 treesize of output 19 [2021-06-05 14:23:18,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,660 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 35 treesize of output 27 [2021-06-05 14:23:18,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:23:18,853 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 14:23:18,853 INFO L628 ElimStorePlain]: treesize reduction 153, result has 65.8 percent of original size [2021-06-05 14:23:18,857 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 28 treesize of output 22 [2021-06-05 14:23:18,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,862 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 19 treesize of output 15 [2021-06-05 14:23:18,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:23:18,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:18,871 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 [2021-06-05 14:23:18,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:19,051 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 14:23:19,052 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.7 percent of original size [2021-06-05 14:23:19,055 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 7 treesize of output 5 [2021-06-05 14:23:19,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,206 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-05 14:23:19,207 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.6 percent of original size [2021-06-05 14:23:19,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:19,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:19,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,294 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 21 treesize of output 7 [2021-06-05 14:23:19,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,298 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 [2021-06-05 14:23:19,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1172 vanished before elimination [2021-06-05 14:23:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:23:19,386 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:23:19,391 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2021-06-05 14:23:19,405 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:19,410 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,413 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 [2021-06-05 14:23:19,414 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,489 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 10 treesize of output 5 [2021-06-05 14:23:19,489 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:19,492 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 20 treesize of output 9 [2021-06-05 14:23:19,493 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:19,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:19,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:19,570 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-05 14:23:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:19,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769634210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:19,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:19,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:23:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218390790] [2021-06-05 14:23:19,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:19,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:19,743 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) [2021-06-05 14:23:20,184 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 14:23:20,403 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:23:20,666 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 14:23:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:20,701 INFO L93 Difference]: Finished difference Result 331 states and 957 transitions. [2021-06-05 14:23:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:20,701 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 [2021-06-05 14:23:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:20,702 INFO L225 Difference]: With dead ends: 331 [2021-06-05 14:23:20,702 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 14:23:20,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 14:23:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-06-05 14:23:20,704 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) [2021-06-05 14:23:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-06-05 14:23:20,705 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-06-05 14:23:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:20,705 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-06-05 14:23:20,705 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) [2021-06-05 14:23:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-06-05 14:23:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:20,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:20,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:20,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4683 [2021-06-05 14:23:20,906 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2073250540, now seen corresponding path program 133 times [2021-06-05 14:23:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:20,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777976124] [2021-06-05 14:23:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:21,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777976124] [2021-06-05 14:23:21,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777976124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959997223] [2021-06-05 14:23:21,167 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 [2021-06-05 14:23:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:21,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:23:21,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:23:21,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,328 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 [2021-06-05 14:23:21,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:21,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:21,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,335 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 25 treesize of output 19 [2021-06-05 14:23:21,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:21,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:21,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-05 14:23:21,500 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]} [2021-06-05 14:23:21,505 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 25 treesize of output 19 [2021-06-05 14:23:21,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,510 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 27 treesize of output 21 [2021-06-05 14:23:21,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:21,708 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:23:21,708 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-05 14:23:21,712 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 7 treesize of output 5 [2021-06-05 14:23:21,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:21,803 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 27 treesize of output 21 [2021-06-05 14:23:21,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:21,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 14:23:21,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,902 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 28 treesize of output 22 [2021-06-05 14:23:21,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:23:21,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,911 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 30 treesize of output 24 [2021-06-05 14:23:21,912 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:21,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:21,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:23:21,920 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,059 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 14:23:22,060 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.1 percent of original size [2021-06-05 14:23:22,060 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:23:22,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:23:22,064 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,073 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 [2021-06-05 14:23:22,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,160 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 [2021-06-05 14:23:22,161 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:22,164 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,240 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 12 treesize of output 5 [2021-06-05 14:23:22,241 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:22,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,247 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 44 treesize of output 19 [2021-06-05 14:23:22,248 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:22,251 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 12 treesize of output 5 [2021-06-05 14:23:22,252 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,254 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 21 treesize of output 7 [2021-06-05 14:23:22,255 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:22,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:22,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:23:22,317 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-05 14:23:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:22,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959997223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 14:23:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615250112] [2021-06-05 14:23:22,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:22,464 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) [2021-06-05 14:23:22,997 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-05 14:23:23,264 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-06-05 14:23:23,459 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 14:23:23,693 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 14:23:23,973 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-05 14:23:24,264 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-05 14:23:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:24,344 INFO L93 Difference]: Finished difference Result 355 states and 1007 transitions. [2021-06-05 14:23:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:23:24,345 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 [2021-06-05 14:23:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:24,345 INFO L225 Difference]: With dead ends: 355 [2021-06-05 14:23:24,345 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 14:23:24,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1969.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:23:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 14:23:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 232. [2021-06-05 14:23:24,349 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) [2021-06-05 14:23:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-06-05 14:23:24,349 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-06-05 14:23:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:24,349 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-06-05 14:23:24,350 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) [2021-06-05 14:23:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-06-05 14:23:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:24,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:24,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:24,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4703 [2021-06-05 14:23:24,565 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:24,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1879133244, now seen corresponding path program 134 times [2021-06-05 14:23:24,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:24,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640149256] [2021-06-05 14:23:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:24,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640149256] [2021-06-05 14:23:24,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640149256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:24,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965986923] [2021-06-05 14:23:24,698 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 [2021-06-05 14:23:24,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:24,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:24,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:24,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,849 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 [2021-06-05 14:23:24,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,853 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 17 treesize of output 13 [2021-06-05 14:23:24,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:24,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:24,856 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 27 treesize of output 21 [2021-06-05 14:23:24,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:24,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:24,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:24,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-05 14:23:24,987 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]} [2021-06-05 14:23:24,992 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 27 treesize of output 21 [2021-06-05 14:23:24,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:24,997 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 17 treesize of output 13 [2021-06-05 14:23:24,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,180 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 14:23:25,180 INFO L628 ElimStorePlain]: treesize reduction 88, result has 76.6 percent of original size [2021-06-05 14:23:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:25,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:25,363 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 14:23:25,364 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.3 percent of original size [2021-06-05 14:23:25,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:23:25,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,529 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 14:23:25,529 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.8 percent of original size [2021-06-05 14:23:25,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:23:25,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:23:25,538 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 14:23:25,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,545 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 38 treesize of output 30 [2021-06-05 14:23:25,547 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:25,707 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 14:23:25,708 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.3 percent of original size [2021-06-05 14:23:25,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,711 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 10 treesize of output 5 [2021-06-05 14:23:25,712 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,715 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 20 treesize of output 9 [2021-06-05 14:23:25,716 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:25,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,804 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 [2021-06-05 14:23:25,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,887 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 12 treesize of output 5 [2021-06-05 14:23:25,888 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,891 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 44 treesize of output 19 [2021-06-05 14:23:25,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,905 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 [2021-06-05 14:23:25,905 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,909 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 11 treesize of output 3 [2021-06-05 14:23:25,909 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:25,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:25,913 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:25,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:25,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1184 vanished before elimination [2021-06-05 14:23:25,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:25,982 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-05 14:23:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:26,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965986923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:26,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:26,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:23:26,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868394375] [2021-06-05 14:23:26,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:26,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:26,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:26,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:26,152 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) [2021-06-05 14:23:26,605 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:23:26,824 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:23:27,091 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 14:23:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:27,126 INFO L93 Difference]: Finished difference Result 332 states and 960 transitions. [2021-06-05 14:23:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:27,126 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 [2021-06-05 14:23:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:27,127 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:23:27,127 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 14:23:27,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1103.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 14:23:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 232. [2021-06-05 14:23:27,129 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) [2021-06-05 14:23:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-06-05 14:23:27,130 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-06-05 14:23:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-06-05 14:23:27,130 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) [2021-06-05 14:23:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-06-05 14:23:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:27,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:27,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:27,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:27,331 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash -798958798, now seen corresponding path program 135 times [2021-06-05 14:23:27,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:27,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497049028] [2021-06-05 14:23:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:27,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:27,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497049028] [2021-06-05 14:23:27,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497049028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:27,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971200579] [2021-06-05 14:23:27,524 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 [2021-06-05 14:23:27,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:23:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:27,631 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 17 treesize of output 13 [2021-06-05 14:23:27,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:27,634 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 [2021-06-05 14:23:27,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:27,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:27,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:27,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:27,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:27,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:27,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-05 14:23:27,763 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]} [2021-06-05 14:23:27,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:27,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,771 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 15 treesize of output 11 [2021-06-05 14:23:27,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:27,911 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 14:23:27,911 INFO L628 ElimStorePlain]: treesize reduction 105, result has 68.2 percent of original size [2021-06-05 14:23:27,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:27,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:28,039 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-05 14:23:28,039 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-05 14:23:28,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 14:23:28,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:28,047 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 [2021-06-05 14:23:28,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,052 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 21 treesize of output 17 [2021-06-05 14:23:28,052 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,056 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 28 treesize of output 22 [2021-06-05 14:23:28,057 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,181 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 14:23:28,182 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.4 percent of original size [2021-06-05 14:23:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:28,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:28,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,253 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 12 treesize of output 5 [2021-06-05 14:23:28,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:28,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,261 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 [2021-06-05 14:23:28,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 15 [2021-06-05 14:23:28,265 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,277 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 7 [2021-06-05 14:23:28,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:23:28,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:23:28,347 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:28,417 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 [2021-06-05 14:23:28,418 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:28,421 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:28,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:28,487 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1190 vanished before elimination [2021-06-05 14:23:28,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:28,488 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-06-05 14:23:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:28,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971200579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:28,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:28,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:23:28,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820601768] [2021-06-05 14:23:28,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:23:28,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:28,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:23:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:23:28,630 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) [2021-06-05 14:23:29,072 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 14:23:29,295 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 14:23:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:29,355 INFO L93 Difference]: Finished difference Result 330 states and 957 transitions. [2021-06-05 14:23:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:23:29,355 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 [2021-06-05 14:23:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:29,356 INFO L225 Difference]: With dead ends: 330 [2021-06-05 14:23:29,356 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:23:29,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 846.7ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:23:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:23:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-06-05 14:23:29,358 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) [2021-06-05 14:23:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-06-05 14:23:29,359 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-06-05 14:23:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:29,359 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-06-05 14:23:29,359 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) [2021-06-05 14:23:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-06-05 14:23:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:23:29,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:29,359 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:29,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4739 [2021-06-05 14:23:29,560 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 309049932, now seen corresponding path program 136 times [2021-06-05 14:23:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:29,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195649130] [2021-06-05 14:23:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:29,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:29,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195649130] [2021-06-05 14:23:29,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195649130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:29,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291035163] [2021-06-05 14:23:29,697 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 [2021-06-05 14:23:29,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,800 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 [2021-06-05 14:23:29,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,804 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 [2021-06-05 14:23:29,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,808 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 27 treesize of output 21 [2021-06-05 14:23:29,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:29,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:29,811 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 17 treesize of output 13 [2021-06-05 14:23:29,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:29,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:29,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:29,851 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-05 14:23:30,004 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1193, array_2], 1=[v_prenex_1192, array_0]} [2021-06-05 14:23:30,016 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 38 treesize of output 30 [2021-06-05 14:23:30,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:30,021 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 29 treesize of output 23 [2021-06-05 14:23:30,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:30,026 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 25 treesize of output 19 [2021-06-05 14:23:30,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:30,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:30,035 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 35 treesize of output 27 [2021-06-05 14:23:30,036 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:23:30,223 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 14:23:30,223 INFO L628 ElimStorePlain]: treesize reduction 223, result has 55.8 percent of original size [2021-06-05 14:23:30,227 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 19 treesize of output 15 [2021-06-05 14:23:30,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,230 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 7 treesize of output 5 [2021-06-05 14:23:30,231 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,234 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 28 treesize of output 22 [2021-06-05 14:23:30,235 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,314 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 12 treesize of output 5 [2021-06-05 14:23:30,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,318 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 21 treesize of output 7 [2021-06-05 14:23:30,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:30,323 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,335 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 12 treesize of output 5 [2021-06-05 14:23:30,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 14:23:30,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,353 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 10 treesize of output 5 [2021-06-05 14:23:30,353 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,356 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 20 treesize of output 9 [2021-06-05 14:23:30,357 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,436 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 11 treesize of output 3 [2021-06-05 14:23:30,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:30,439 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 21 treesize of output 7 [2021-06-05 14:23:30,440 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:30,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:30,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:30,509 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 4 variables, input treesize:374, output treesize:161 [2021-06-05 14:23:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:30,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291035163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:30,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:30,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:23:30,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674817662] [2021-06-05 14:23:30,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:23:30,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:30,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:23:30,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:23:30,682 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) [2021-06-05 14:23:31,020 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 14:23:31,285 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-05 14:23:31,654 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-06-05 14:23:32,057 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-06-05 14:23:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:32,098 INFO L93 Difference]: Finished difference Result 365 states and 1050 transitions. [2021-06-05 14:23:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:23:32,099 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 [2021-06-05 14:23:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:32,099 INFO L225 Difference]: With dead ends: 365 [2021-06-05 14:23:32,099 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:23:32,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1534.6ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:23:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:23:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 227. [2021-06-05 14:23:32,102 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) [2021-06-05 14:23:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-06-05 14:23:32,102 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-06-05 14:23:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:32,102 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-06-05 14:23:32,102 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) [2021-06-05 14:23:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-06-05 14:23:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:32,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:32,103 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:32,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4759,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:32,303 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:32,303 INFO L82 PathProgramCache]: Analyzing trace with hash -697232062, now seen corresponding path program 137 times [2021-06-05 14:23:32,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:32,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494481071] [2021-06-05 14:23:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:32,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494481071] [2021-06-05 14:23:32,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494481071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:32,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639040304] [2021-06-05 14:23:32,402 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 [2021-06-05 14:23:32,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:23:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,627 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 16 treesize of output 12 [2021-06-05 14:23:32,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,632 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 26 treesize of output 20 [2021-06-05 14:23:32,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,636 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 16 treesize of output 12 [2021-06-05 14:23:32,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,640 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 15 treesize of output 11 [2021-06-05 14:23:32,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,644 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 25 treesize of output 19 [2021-06-05 14:23:32,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,647 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 [2021-06-05 14:23:32,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,743 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:23:32,748 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. [2021-06-05 14:23:32,748 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:23:32,921 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:23:32,923 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 27 treesize of output 21 [2021-06-05 14:23:32,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:32,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:32,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,947 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:23:32,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:32,949 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 [2021-06-05 14:23:32,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:32,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:32,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:32,957 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:23:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:32,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639040304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:32,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:32,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:32,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170189200] [2021-06-05 14:23:32,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:32,978 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) [2021-06-05 14:23:33,394 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 14:23:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:33,798 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-06-05 14:23:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:23:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:33,799 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:23:33,799 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 14:23:33,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 14:23:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 238. [2021-06-05 14:23:33,802 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) [2021-06-05 14:23:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-06-05 14:23:33,802 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 18 [2021-06-05 14:23:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:33,803 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-06-05 14:23:33,803 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) [2021-06-05 14:23:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-06-05 14:23:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:33,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:33,803 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:34,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4780 [2021-06-05 14:23:34,004 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash -741485940, now seen corresponding path program 138 times [2021-06-05 14:23:34,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:34,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304663575] [2021-06-05 14:23:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:34,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304663575] [2021-06-05 14:23:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304663575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098375224] [2021-06-05 14:23:34,250 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 [2021-06-05 14:23:34,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:23:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:34,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,679 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 15 treesize of output 11 [2021-06-05 14:23:34,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,683 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 17 treesize of output 13 [2021-06-05 14:23:34,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,735 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 25 treesize of output 19 [2021-06-05 14:23:34,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,739 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 27 treesize of output 21 [2021-06-05 14:23:34,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:34,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:34,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:34,798 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 15 treesize of output 11 [2021-06-05 14:23:34,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:34,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:34,863 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. [2021-06-05 14:23:34,863 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:172, output treesize:146 [2021-06-05 14:23:35,305 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-06-05 14:23:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,310 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 [2021-06-05 14:23:35,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,316 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 16 treesize of output 12 [2021-06-05 14:23:35,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,321 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 [2021-06-05 14:23:35,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,327 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 16 treesize of output 12 [2021-06-05 14:23:35,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,333 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 25 treesize of output 19 [2021-06-05 14:23:35,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:35,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,344 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 [2021-06-05 14:23:35,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:23:35,351 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:35,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,361 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 19 treesize of output 15 [2021-06-05 14:23:35,362 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,367 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 [2021-06-05 14:23:35,367 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,371 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 26 treesize of output 20 [2021-06-05 14:23:35,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,503 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 14:23:35,504 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-06-05 14:23:35,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,508 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 10 treesize of output 5 [2021-06-05 14:23:35,508 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:35,512 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 20 treesize of output 9 [2021-06-05 14:23:35,513 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:35,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:35,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:23:35,567 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-06-05 14:23:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:35,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098375224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:35,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:35,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:23:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844559649] [2021-06-05 14:23:35,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:35,650 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) [2021-06-05 14:23:36,422 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-06-05 14:23:36,894 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-06-05 14:23:37,300 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-06-05 14:23:37,708 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 125 [2021-06-05 14:23:37,947 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2021-06-05 14:23:38,150 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 14:23:38,548 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-06-05 14:23:38,805 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2021-06-05 14:23:39,032 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2021-06-05 14:23:39,233 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 14:23:39,390 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 14:23:39,711 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-06-05 14:23:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:39,789 INFO L93 Difference]: Finished difference Result 591 states and 1634 transitions. [2021-06-05 14:23:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:23:39,789 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 [2021-06-05 14:23:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:39,790 INFO L225 Difference]: With dead ends: 591 [2021-06-05 14:23:39,790 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:23:39,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 4257.4ms TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:23:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:23:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 279. [2021-06-05 14:23:39,794 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) [2021-06-05 14:23:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 822 transitions. [2021-06-05 14:23:39,794 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 822 transitions. Word has length 18 [2021-06-05 14:23:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:39,794 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 822 transitions. [2021-06-05 14:23:39,794 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) [2021-06-05 14:23:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 822 transitions. [2021-06-05 14:23:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:39,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:39,795 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:39,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4796,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:39,996 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1648668880, now seen corresponding path program 139 times [2021-06-05 14:23:39,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:39,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532150189] [2021-06-05 14:23:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:40,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532150189] [2021-06-05 14:23:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532150189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980675406] [2021-06-05 14:23:40,131 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 [2021-06-05 14:23:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:23:40,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:40,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,389 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 26 treesize of output 20 [2021-06-05 14:23:40,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,395 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 [2021-06-05 14:23:40,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,401 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 16 treesize of output 12 [2021-06-05 14:23:40,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,407 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 16 treesize of output 12 [2021-06-05 14:23:40,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,412 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 [2021-06-05 14:23:40,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,417 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 [2021-06-05 14:23:40,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,537 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 14:23:40,537 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:23:40,542 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. [2021-06-05 14:23:40,542 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:23:40,775 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:23:40,777 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 [2021-06-05 14:23:40,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:40,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:40,801 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:23:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:40,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:40,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:40,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:40,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:40,810 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:23:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:40,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980675406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:40,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:40,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:40,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575385148] [2021-06-05 14:23:40,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:40,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:40,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:40,833 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) [2021-06-05 14:23:41,278 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 14:23:41,452 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:23:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:41,712 INFO L93 Difference]: Finished difference Result 398 states and 1123 transitions. [2021-06-05 14:23:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:23:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:41,713 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:23:41,713 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:23:41,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:23:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 281. [2021-06-05 14:23:41,716 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) [2021-06-05 14:23:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-06-05 14:23:41,716 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-06-05 14:23:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:41,717 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-06-05 14:23:41,717 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) [2021-06-05 14:23:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-06-05 14:23:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:41,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:41,717 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:41,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:41,918 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1165060546, now seen corresponding path program 140 times [2021-06-05 14:23:41,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:41,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557639132] [2021-06-05 14:23:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:42,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557639132] [2021-06-05 14:23:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557639132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485441772] [2021-06-05 14:23:42,071 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 [2021-06-05 14:23:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:23:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:42,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:42,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,306 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 16 treesize of output 12 [2021-06-05 14:23:42,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,310 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 26 treesize of output 20 [2021-06-05 14:23:42,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,315 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 [2021-06-05 14:23:42,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,319 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 [2021-06-05 14:23:42,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,322 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 15 treesize of output 11 [2021-06-05 14:23:42,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,420 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:23:42,423 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. [2021-06-05 14:23:42,424 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:23:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,593 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 17 treesize of output 13 [2021-06-05 14:23:42,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,597 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 [2021-06-05 14:23:42,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,661 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-05 14:23:42,661 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:23:42,664 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 7 treesize of output 5 [2021-06-05 14:23:42,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:42,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:42,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,719 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1223 vanished before elimination [2021-06-05 14:23:42,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:42,722 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 21 treesize of output 7 [2021-06-05 14:23:42,722 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,725 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 11 treesize of output 3 [2021-06-05 14:23:42,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:42,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:42,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:42,756 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:23:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:42,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485441772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:42,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:42,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043807828] [2021-06-05 14:23:42,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:42,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:42,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:42,816 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) [2021-06-05 14:23:43,349 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:23:43,735 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-05 14:23:43,963 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-05 14:23:44,142 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-05 14:23:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:44,448 INFO L93 Difference]: Finished difference Result 485 states and 1284 transitions. [2021-06-05 14:23:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:23:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:23:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:44,449 INFO L225 Difference]: With dead ends: 485 [2021-06-05 14:23:44,449 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:23:44,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1667.9ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:23:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:23:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 281. [2021-06-05 14:23:44,452 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) [2021-06-05 14:23:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-06-05 14:23:44,453 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-06-05 14:23:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:44,453 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-06-05 14:23:44,453 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) [2021-06-05 14:23:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-06-05 14:23:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:44,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:44,453 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:44,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4849 [2021-06-05 14:23:44,654 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:44,654 INFO L82 PathProgramCache]: Analyzing trace with hash 575583500, now seen corresponding path program 141 times [2021-06-05 14:23:44,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:44,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058156871] [2021-06-05 14:23:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:44,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058156871] [2021-06-05 14:23:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058156871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:44,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006864983] [2021-06-05 14:23:44,763 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 [2021-06-05 14:23:44,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:23:44,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:44,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:23:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:45,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,052 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 [2021-06-05 14:23:45,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,056 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 15 treesize of output 11 [2021-06-05 14:23:45,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,060 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 [2021-06-05 14:23:45,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,064 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 [2021-06-05 14:23:45,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,068 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 [2021-06-05 14:23:45,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,072 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 16 treesize of output 12 [2021-06-05 14:23:45,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,184 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:23:45,184 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:23:45,188 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. [2021-06-05 14:23:45,188 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:23:45,352 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:23:45,354 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 [2021-06-05 14:23:45,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:45,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,378 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:23:45,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:45,380 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 [2021-06-05 14:23:45,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:45,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:45,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:23:45,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:23:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:45,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006864983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:45,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:45,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:45,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172256101] [2021-06-05 14:23:45,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:45,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:45,411 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) [2021-06-05 14:23:45,966 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:23:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:46,206 INFO L93 Difference]: Finished difference Result 373 states and 1063 transitions. [2021-06-05 14:23:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:23:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:46,207 INFO L225 Difference]: With dead ends: 373 [2021-06-05 14:23:46,207 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:23:46,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:23:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-06-05 14:23:46,210 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) [2021-06-05 14:23:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-06-05 14:23:46,210 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 18 [2021-06-05 14:23:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:46,210 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-06-05 14:23:46,210 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) [2021-06-05 14:23:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-06-05 14:23:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:46,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:46,211 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:46,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:46,412 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1033000770, now seen corresponding path program 142 times [2021-06-05 14:23:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:46,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154923828] [2021-06-05 14:23:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:46,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154923828] [2021-06-05 14:23:46,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154923828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061392798] [2021-06-05 14:23:46,516 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 [2021-06-05 14:23:46,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:23:46,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:46,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,823 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 25 treesize of output 19 [2021-06-05 14:23:46,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:46,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,888 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 [2021-06-05 14:23:46,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,893 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 17 treesize of output 13 [2021-06-05 14:23:46,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:46,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,951 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 27 treesize of output 21 [2021-06-05 14:23:46,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:46,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:46,955 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 [2021-06-05 14:23:46,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:47,016 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. [2021-06-05 14:23:47,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-06-05 14:23:47,279 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-05 14:23:47,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,283 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 18 treesize of output 14 [2021-06-05 14:23:47,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,288 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 16 treesize of output 12 [2021-06-05 14:23:47,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,293 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 16 treesize of output 12 [2021-06-05 14:23:47,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,298 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 [2021-06-05 14:23:47,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:47,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,308 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 26 treesize of output 20 [2021-06-05 14:23:47,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,312 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 26 treesize of output 20 [2021-06-05 14:23:47,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,317 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 19 treesize of output 15 [2021-06-05 14:23:47,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,323 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 27 treesize of output 21 [2021-06-05 14:23:47,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,327 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 28 treesize of output 22 [2021-06-05 14:23:47,328 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,332 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 25 treesize of output 19 [2021-06-05 14:23:47,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,342 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 15 treesize of output 11 [2021-06-05 14:23:47,343 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,455 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 14:23:47,455 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-06-05 14:23:47,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,459 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 10 treesize of output 5 [2021-06-05 14:23:47,460 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:47,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:23:47,464 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:47,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:47,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:23:47,506 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-05 14:23:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061392798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:47,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:47,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:23:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692687613] [2021-06-05 14:23:47,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:47,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:47,582 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) [2021-06-05 14:23:48,471 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2021-06-05 14:23:48,973 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2021-06-05 14:23:49,453 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:23:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:49,902 INFO L93 Difference]: Finished difference Result 506 states and 1412 transitions. [2021-06-05 14:23:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:23:49,902 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 [2021-06-05 14:23:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:49,903 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:23:49,903 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 14:23:49,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2196.6ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:23:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 14:23:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 297. [2021-06-05 14:23:49,907 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) [2021-06-05 14:23:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 877 transitions. [2021-06-05 14:23:49,907 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 877 transitions. Word has length 18 [2021-06-05 14:23:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:49,907 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 877 transitions. [2021-06-05 14:23:49,908 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) [2021-06-05 14:23:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 877 transitions. [2021-06-05 14:23:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:49,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:49,908 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:50,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4887 [2021-06-05 14:23:50,125 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2056821370, now seen corresponding path program 143 times [2021-06-05 14:23:50,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:50,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979677812] [2021-06-05 14:23:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:50,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979677812] [2021-06-05 14:23:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979677812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:50,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190049853] [2021-06-05 14:23:50,261 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 [2021-06-05 14:23:50,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:50,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:23:50,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,546 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 15 treesize of output 11 [2021-06-05 14:23:50,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,550 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 25 treesize of output 19 [2021-06-05 14:23:50,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,554 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 [2021-06-05 14:23:50,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:50,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,563 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 [2021-06-05 14:23:50,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:23:50,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,678 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:23:50,678 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:23:50,683 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. [2021-06-05 14:23:50,683 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:23:50,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,821 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 [2021-06-05 14:23:50,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,826 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 25 treesize of output 19 [2021-06-05 14:23:50,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,897 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-05 14:23:50,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:23:50,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:50,930 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 11 treesize of output 3 [2021-06-05 14:23:50,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:23:50,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,969 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 7 treesize of output 5 [2021-06-05 14:23:50,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:50,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:50,993 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1247 vanished before elimination [2021-06-05 14:23:50,993 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1249 vanished before elimination [2021-06-05 14:23:50,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:50,995 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:23:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190049853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:51,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686523464] [2021-06-05 14:23:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:51,055 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) [2021-06-05 14:23:51,939 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-05 14:23:52,118 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 14:23:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:52,400 INFO L93 Difference]: Finished difference Result 459 states and 1244 transitions. [2021-06-05 14:23:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:23:52,401 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 [2021-06-05 14:23:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:52,401 INFO L225 Difference]: With dead ends: 459 [2021-06-05 14:23:52,401 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:23:52,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1416.5ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:23:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:23:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-06-05 14:23:52,405 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) [2021-06-05 14:23:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-06-05 14:23:52,405 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-06-05 14:23:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:52,405 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-06-05 14:23:52,405 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) [2021-06-05 14:23:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-06-05 14:23:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:52,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:52,406 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:52,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-05 14:23:52,606 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 740664066, now seen corresponding path program 144 times [2021-06-05 14:23:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851726464] [2021-06-05 14:23:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:52,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851726464] [2021-06-05 14:23:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851726464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150162612] [2021-06-05 14:23:52,726 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 [2021-06-05 14:23:52,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:23:52,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:53,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:53,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:53,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:53,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,086 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 17 treesize of output 13 [2021-06-05 14:23:53,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,149 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 17 treesize of output 13 [2021-06-05 14:23:53,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,153 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 [2021-06-05 14:23:53,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,212 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. [2021-06-05 14:23:53,212 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:23:53,375 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:23:53,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,380 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 16 treesize of output 12 [2021-06-05 14:23:53,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,385 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 29 treesize of output 23 [2021-06-05 14:23:53,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,390 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 26 treesize of output 20 [2021-06-05 14:23:53,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,395 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 17 treesize of output 13 [2021-06-05 14:23:53,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:23:53,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:53,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,409 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 [2021-06-05 14:23:53,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,414 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 28 treesize of output 22 [2021-06-05 14:23:53,415 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,419 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 16 treesize of output 12 [2021-06-05 14:23:53,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,424 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 19 treesize of output 15 [2021-06-05 14:23:53,424 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,428 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 18 treesize of output 14 [2021-06-05 14:23:53,429 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,433 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 15 treesize of output 11 [2021-06-05 14:23:53,433 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,590 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 14:23:53,591 INFO L628 ElimStorePlain]: treesize reduction 119, result has 59.7 percent of original size [2021-06-05 14:23:53,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:23:53,595 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,599 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 21 treesize of output 7 [2021-06-05 14:23:53,600 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:53,603 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 [2021-06-05 14:23:53,603 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:53,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:53,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:23:53,664 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-06-05 14:23:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:53,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150162612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:53,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:53,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:23:53,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293122751] [2021-06-05 14:23:53,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:23:53,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:23:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:23:53,764 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) [2021-06-05 14:23:54,467 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2021-06-05 14:23:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:54,755 INFO L93 Difference]: Finished difference Result 386 states and 1106 transitions. [2021-06-05 14:23:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:23:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:23:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:54,755 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:23:54,756 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:23:54,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1137.6ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:23:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:23:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 295. [2021-06-05 14:23:54,758 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) [2021-06-05 14:23:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-06-05 14:23:54,759 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-06-05 14:23:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:54,759 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-06-05 14:23:54,759 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) [2021-06-05 14:23:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-06-05 14:23:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:54,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:54,760 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:54,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4947,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:54,960 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1935700240, now seen corresponding path program 145 times [2021-06-05 14:23:54,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:54,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697044451] [2021-06-05 14:23:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:55,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:55,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697044451] [2021-06-05 14:23:55,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697044451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:55,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990937231] [2021-06-05 14:23:55,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:23:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:55,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:23:55,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,432 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 16 treesize of output 12 [2021-06-05 14:23:55,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,436 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 26 treesize of output 20 [2021-06-05 14:23:55,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,441 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 [2021-06-05 14:23:55,442 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,446 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 15 treesize of output 11 [2021-06-05 14:23:55,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,452 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 25 treesize of output 19 [2021-06-05 14:23:55,453 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,584 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:23:55,585 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:23:55,589 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. [2021-06-05 14:23:55,589 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:23:55,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,725 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 17 treesize of output 13 [2021-06-05 14:23:55,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,729 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 15 treesize of output 11 [2021-06-05 14:23:55,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,793 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-05 14:23:55,793 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:23:55,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:55,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:55,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:23:55,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:55,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:23:55,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,858 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 [2021-06-05 14:23:55,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:55,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:55,893 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1269 vanished before elimination [2021-06-05 14:23:55,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:23:55,895 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:23:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:55,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990937231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:55,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:55,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:23:55,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063355662] [2021-06-05 14:23:55,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:55,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:55,958 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) [2021-06-05 14:23:56,826 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-05 14:23:57,246 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 14:23:57,685 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 14:23:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:23:58,168 INFO L93 Difference]: Finished difference Result 520 states and 1474 transitions. [2021-06-05 14:23:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:23:58,169 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 [2021-06-05 14:23:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:23:58,169 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:23:58,170 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:23:58,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2078.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:23:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:23:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 311. [2021-06-05 14:23:58,173 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) [2021-06-05 14:23:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-06-05 14:23:58,174 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 18 [2021-06-05 14:23:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:23:58,174 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-06-05 14:23:58,174 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) [2021-06-05 14:23:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-06-05 14:23:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:23:58,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:23:58,174 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:23:58,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4976,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:23:58,375 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:23:58,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:23:58,375 INFO L82 PathProgramCache]: Analyzing trace with hash -878029186, now seen corresponding path program 146 times [2021-06-05 14:23:58,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:23:58,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331487286] [2021-06-05 14:23:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:23:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:23:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:58,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:23:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331487286] [2021-06-05 14:23:58,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331487286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735958235] [2021-06-05 14:23:58,512 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 [2021-06-05 14:23:58,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:23:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:23:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:23:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:23:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,815 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 26 treesize of output 20 [2021-06-05 14:23:58,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,820 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 15 treesize of output 11 [2021-06-05 14:23:58,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,824 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 [2021-06-05 14:23:58,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,829 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 16 treesize of output 12 [2021-06-05 14:23:58,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,833 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 25 treesize of output 19 [2021-06-05 14:23:58,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:58,837 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 16 treesize of output 12 [2021-06-05 14:23:58,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:58,949 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:23:58,949 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:23:58,954 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. [2021-06-05 14:23:58,954 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:23:59,110 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1277], 1=[array_2, v_prenex_1276]} [2021-06-05 14:23:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:23:59,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,116 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 15 treesize of output 11 [2021-06-05 14:23:59,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,146 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:23:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:23:59,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:23:59,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,164 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:23:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,166 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 20 treesize of output 9 [2021-06-05 14:23:59,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:23:59,169 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 10 treesize of output 5 [2021-06-05 14:23:59,170 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:23:59,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:23:59,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:23:59,190 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-05 14:23:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:23:59,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735958235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:23:59,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:23:59,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:23:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885044482] [2021-06-05 14:23:59,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:23:59,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:23:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:23:59,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:23:59,217 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) [2021-06-05 14:24:00,385 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-06-05 14:24:00,569 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:24:00,819 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2021-06-05 14:24:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:01,535 INFO L93 Difference]: Finished difference Result 536 states and 1555 transitions. [2021-06-05 14:24:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:24:01,536 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 [2021-06-05 14:24:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:01,536 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:24:01,536 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 14:24:01,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2182.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:24:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 14:24:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 322. [2021-06-05 14:24:01,540 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) [2021-06-05 14:24:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 978 transitions. [2021-06-05 14:24:01,540 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 978 transitions. Word has length 18 [2021-06-05 14:24:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:01,540 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 978 transitions. [2021-06-05 14:24:01,541 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) [2021-06-05 14:24:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 978 transitions. [2021-06-05 14:24:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:01,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:01,541 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:01,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5002 [2021-06-05 14:24:01,741 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:01,742 INFO L82 PathProgramCache]: Analyzing trace with hash 69237234, now seen corresponding path program 147 times [2021-06-05 14:24:01,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:01,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034775875] [2021-06-05 14:24:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:01,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:01,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034775875] [2021-06-05 14:24:01,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034775875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568812801] [2021-06-05 14:24:01,835 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 [2021-06-05 14:24:01,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:24:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:01,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,112 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 15 treesize of output 11 [2021-06-05 14:24:02,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,117 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 [2021-06-05 14:24:02,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,121 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 26 treesize of output 20 [2021-06-05 14:24:02,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,125 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 16 treesize of output 12 [2021-06-05 14:24:02,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,130 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 [2021-06-05 14:24:02,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,133 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 16 treesize of output 12 [2021-06-05 14:24:02,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,254 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:24:02,255 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:02,259 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. [2021-06-05 14:24:02,259 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:02,419 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:24:02,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:02,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:02,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:02,455 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:24:02,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:02,457 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 21 treesize of output 7 [2021-06-05 14:24:02,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:02,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:02,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:02,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:24:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:02,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568812801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:02,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:02,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365054826] [2021-06-05 14:24:02,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:02,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:02,486 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) [2021-06-05 14:24:03,091 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-05 14:24:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:03,364 INFO L93 Difference]: Finished difference Result 430 states and 1261 transitions. [2021-06-05 14:24:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:03,364 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 [2021-06-05 14:24:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:03,365 INFO L225 Difference]: With dead ends: 430 [2021-06-05 14:24:03,365 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:24:03,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 994.1ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:24:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 328. [2021-06-05 14:24:03,368 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) [2021-06-05 14:24:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 995 transitions. [2021-06-05 14:24:03,369 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 995 transitions. Word has length 18 [2021-06-05 14:24:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:03,369 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 995 transitions. [2021-06-05 14:24:03,369 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) [2021-06-05 14:24:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 995 transitions. [2021-06-05 14:24:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:03,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:03,370 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:03,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5025 [2021-06-05 14:24:03,570 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1539347036, now seen corresponding path program 148 times [2021-06-05 14:24:03,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:03,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728656664] [2021-06-05 14:24:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:03,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728656664] [2021-06-05 14:24:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728656664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:03,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612364519] [2021-06-05 14:24:03,710 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 [2021-06-05 14:24:03,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:03,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:03,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,074 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 [2021-06-05 14:24:04,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,078 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 [2021-06-05 14:24:04,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,139 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 [2021-06-05 14:24:04,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,143 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 15 treesize of output 11 [2021-06-05 14:24:04,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:04,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,209 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 27 treesize of output 21 [2021-06-05 14:24:04,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:04,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,268 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. [2021-06-05 14:24:04,268 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-06-05 14:24:04,537 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-05 14:24:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:24:04,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,546 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 18 treesize of output 14 [2021-06-05 14:24:04,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,551 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 16 treesize of output 12 [2021-06-05 14:24:04,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,555 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 19 treesize of output 15 [2021-06-05 14:24:04,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,560 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 27 treesize of output 21 [2021-06-05 14:24:04,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,565 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 15 treesize of output 11 [2021-06-05 14:24:04,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:04,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:04,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,579 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 [2021-06-05 14:24:04,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,584 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 28 treesize of output 22 [2021-06-05 14:24:04,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:04,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:24:04,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,706 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 14:24:04,706 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-06-05 14:24:04,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,710 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 10 treesize of output 5 [2021-06-05 14:24:04,711 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:04,714 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 [2021-06-05 14:24:04,715 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:04,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:04,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:24:04,757 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-05 14:24:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612364519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321457618] [2021-06-05 14:24:04,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:04,834 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) [2021-06-05 14:24:05,812 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 117 [2021-06-05 14:24:06,432 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 124 [2021-06-05 14:24:06,737 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-06-05 14:24:06,930 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:24:07,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:07,364 INFO L93 Difference]: Finished difference Result 585 states and 1675 transitions. [2021-06-05 14:24:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:24:07,364 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 [2021-06-05 14:24:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:07,365 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:24:07,365 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:24:07,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2508.8ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:24:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:24:07,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 340. [2021-06-05 14:24:07,369 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) [2021-06-05 14:24:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1029 transitions. [2021-06-05 14:24:07,369 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1029 transitions. Word has length 18 [2021-06-05 14:24:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:07,370 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1029 transitions. [2021-06-05 14:24:07,370 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) [2021-06-05 14:24:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1029 transitions. [2021-06-05 14:24:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:07,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:07,370 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:07,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:07,571 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1550475104, now seen corresponding path program 149 times [2021-06-05 14:24:07,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:07,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668782155] [2021-06-05 14:24:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:07,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668782155] [2021-06-05 14:24:07,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668782155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526613773] [2021-06-05 14:24:07,685 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 [2021-06-05 14:24:07,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:07,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:07,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,975 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 [2021-06-05 14:24:07,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,980 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 26 treesize of output 20 [2021-06-05 14:24:07,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:07,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,988 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 [2021-06-05 14:24:07,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,993 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 [2021-06-05 14:24:07,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:07,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:07,997 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 16 treesize of output 12 [2021-06-05 14:24:07,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,109 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:24:08,109 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:08,113 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. [2021-06-05 14:24:08,113 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:08,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:24:08,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,304 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-06-05 14:24:08,304 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:24:08,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,332 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 27 treesize of output 21 [2021-06-05 14:24:08,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:08,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,358 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1300 vanished before elimination [2021-06-05 14:24:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:08,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:08,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:24:08,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:08,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:08,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:08,396 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:24:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526613773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:08,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:08,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:08,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583336764] [2021-06-05 14:24:08,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:08,456 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) [2021-06-05 14:24:09,359 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-05 14:24:09,552 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-05 14:24:09,676 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 14:24:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:09,979 INFO L93 Difference]: Finished difference Result 529 states and 1464 transitions. [2021-06-05 14:24:09,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:24:09,980 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 [2021-06-05 14:24:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:09,980 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:24:09,980 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:24:09,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1512.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:24:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:24:09,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 338. [2021-06-05 14:24:09,984 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) [2021-06-05 14:24:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-06-05 14:24:09,985 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-06-05 14:24:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:09,985 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-06-05 14:24:09,985 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) [2021-06-05 14:24:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-06-05 14:24:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:09,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:09,985 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:10,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5083 [2021-06-05 14:24:10,186 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 234317800, now seen corresponding path program 150 times [2021-06-05 14:24:10,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:10,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313686956] [2021-06-05 14:24:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:10,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:10,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313686956] [2021-06-05 14:24:10,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313686956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:10,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688455290] [2021-06-05 14:24:10,312 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 [2021-06-05 14:24:10,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:24:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:10,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:10,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,667 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 [2021-06-05 14:24:10,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,672 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 27 treesize of output 21 [2021-06-05 14:24:10,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:10,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:10,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,739 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 17 treesize of output 13 [2021-06-05 14:24:10,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:10,804 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. [2021-06-05 14:24:10,804 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:24:10,969 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:24:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,974 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 20 treesize of output 16 [2021-06-05 14:24:10,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:10,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,983 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 28 treesize of output 22 [2021-06-05 14:24:10,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,988 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 26 treesize of output 20 [2021-06-05 14:24:10,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:10,993 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 16 treesize of output 12 [2021-06-05 14:24:10,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,009 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 [2021-06-05 14:24:11,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:11,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,019 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 18 treesize of output 14 [2021-06-05 14:24:11,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:11,024 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,028 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 19 treesize of output 15 [2021-06-05 14:24:11,029 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,033 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 17 treesize of output 13 [2021-06-05 14:24:11,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,037 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 29 treesize of output 23 [2021-06-05 14:24:11,038 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,189 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 14:24:11,189 INFO L628 ElimStorePlain]: treesize reduction 138, result has 56.1 percent of original size [2021-06-05 14:24:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,194 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 9 treesize of output 3 [2021-06-05 14:24:11,194 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:24:11,199 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:11,202 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 21 treesize of output 7 [2021-06-05 14:24:11,203 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:11,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:11,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:24:11,263 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-06-05 14:24:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:11,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688455290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:11,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:11,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:11,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986444523] [2021-06-05 14:24:11,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:11,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:11,362 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) [2021-06-05 14:24:12,085 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2021-06-05 14:24:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:12,381 INFO L93 Difference]: Finished difference Result 443 states and 1300 transitions. [2021-06-05 14:24:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:12,381 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 [2021-06-05 14:24:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:12,382 INFO L225 Difference]: With dead ends: 443 [2021-06-05 14:24:12,382 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:24:12,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1157.8ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:24:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 338. [2021-06-05 14:24:12,386 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) [2021-06-05 14:24:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-06-05 14:24:12,387 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-06-05 14:24:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:12,387 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-06-05 14:24:12,388 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) [2021-06-05 14:24:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-06-05 14:24:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:12,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:12,388 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:12,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5105,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:12,605 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:12,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1429353974, now seen corresponding path program 151 times [2021-06-05 14:24:12,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:12,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331201695] [2021-06-05 14:24:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:12,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:12,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331201695] [2021-06-05 14:24:12,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331201695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:12,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960810628] [2021-06-05 14:24:12,739 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 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 [2021-06-05 14:24:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:13,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:24:13,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,032 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 16 treesize of output 12 [2021-06-05 14:24:13,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,038 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 [2021-06-05 14:24:13,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,044 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 16 treesize of output 12 [2021-06-05 14:24:13,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,050 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 25 treesize of output 19 [2021-06-05 14:24:13,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,055 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 15 treesize of output 11 [2021-06-05 14:24:13,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,189 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:24:13,189 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:13,194 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. [2021-06-05 14:24:13,194 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,329 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 [2021-06-05 14:24:13,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,333 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 [2021-06-05 14:24:13,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,398 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-05 14:24:13,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1319 vanished before elimination [2021-06-05 14:24:13,401 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 7 treesize of output 5 [2021-06-05 14:24:13,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,425 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:13,427 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 27 treesize of output 21 [2021-06-05 14:24:13,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:13,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:24:13,458 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:13,461 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 20 treesize of output 9 [2021-06-05 14:24:13,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:13,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:13,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:13,494 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:24:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:13,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960810628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:13,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:13,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:13,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842457656] [2021-06-05 14:24:13,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:13,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:13,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:13,558 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) [2021-06-05 14:24:14,118 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-06-05 14:24:14,466 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 14:24:14,832 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 14:24:15,227 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 14:24:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:15,682 INFO L93 Difference]: Finished difference Result 581 states and 1679 transitions. [2021-06-05 14:24:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:24:15,682 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 [2021-06-05 14:24:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:15,683 INFO L225 Difference]: With dead ends: 581 [2021-06-05 14:24:15,683 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:24:15,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2032.8ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:24:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:24:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-06-05 14:24:15,687 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) [2021-06-05 14:24:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1039 transitions. [2021-06-05 14:24:15,688 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1039 transitions. Word has length 18 [2021-06-05 14:24:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1039 transitions. [2021-06-05 14:24:15,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:24:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1039 transitions. [2021-06-05 14:24:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:15,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:15,690 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:15,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5134 [2021-06-05 14:24:15,893 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:15,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1384375452, now seen corresponding path program 152 times [2021-06-05 14:24:15,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:15,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437134847] [2021-06-05 14:24:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:16,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:16,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437134847] [2021-06-05 14:24:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437134847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:16,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988400941] [2021-06-05 14:24:16,018 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 [2021-06-05 14:24:16,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:16,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:16,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,329 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 [2021-06-05 14:24:16,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:16,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,338 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 16 treesize of output 12 [2021-06-05 14:24:16,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,343 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 26 treesize of output 20 [2021-06-05 14:24:16,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,347 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 16 treesize of output 12 [2021-06-05 14:24:16,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:16,352 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,465 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-05 14:24:16,466 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:16,470 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. [2021-06-05 14:24:16,470 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:16,649 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1329, array_4], 1=[v_prenex_1328, array_2]} [2021-06-05 14:24:16,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:16,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:16,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,685 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:24:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:16,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:16,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,702 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1328 vanished before elimination [2021-06-05 14:24:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,704 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 20 treesize of output 9 [2021-06-05 14:24:16,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:16,707 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 10 treesize of output 5 [2021-06-05 14:24:16,707 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:16,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:16,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:16,728 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-05 14:24:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:16,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988400941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:16,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:16,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:16,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769508465] [2021-06-05 14:24:16,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:16,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:16,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:16,754 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) [2021-06-05 14:24:17,847 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-05 14:24:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:18,881 INFO L93 Difference]: Finished difference Result 596 states and 1739 transitions. [2021-06-05 14:24:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:24:18,881 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 [2021-06-05 14:24:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:18,883 INFO L225 Difference]: With dead ends: 596 [2021-06-05 14:24:18,883 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 14:24:18,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1974.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:24:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 14:24:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 333. [2021-06-05 14:24:18,887 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) [2021-06-05 14:24:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-06-05 14:24:18,888 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-06-05 14:24:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:18,888 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-06-05 14:24:18,888 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) [2021-06-05 14:24:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-06-05 14:24:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:18,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:18,889 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:19,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5160 [2021-06-05 14:24:19,089 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -300912002, now seen corresponding path program 153 times [2021-06-05 14:24:19,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:19,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552991149] [2021-06-05 14:24:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:19,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552991149] [2021-06-05 14:24:19,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552991149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:19,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370574373] [2021-06-05 14:24:19,197 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 [2021-06-05 14:24:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:24:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:19,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,496 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 25 treesize of output 19 [2021-06-05 14:24:19,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:19,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:19,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,571 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 17 treesize of output 13 [2021-06-05 14:24:19,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,575 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 [2021-06-05 14:24:19,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:19,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:19,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:19,711 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. [2021-06-05 14:24:19,711 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-05 14:24:19,934 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:24:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,939 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 19 treesize of output 15 [2021-06-05 14:24:19,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,945 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 [2021-06-05 14:24:19,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,950 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 26 treesize of output 20 [2021-06-05 14:24:19,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,956 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 18 treesize of output 14 [2021-06-05 14:24:19,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:19,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,967 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 16 treesize of output 12 [2021-06-05 14:24:19,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,972 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 28 treesize of output 22 [2021-06-05 14:24:19,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:19,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,984 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 17 treesize of output 13 [2021-06-05 14:24:19,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,989 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 16 treesize of output 12 [2021-06-05 14:24:19,990 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:19,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:19,995 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 [2021-06-05 14:24:19,996 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,000 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 29 treesize of output 23 [2021-06-05 14:24:20,001 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,193 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 14:24:20,193 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-06-05 14:24:20,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,198 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 9 treesize of output 3 [2021-06-05 14:24:20,198 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,203 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 [2021-06-05 14:24:20,203 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:20,207 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 21 treesize of output 7 [2021-06-05 14:24:20,208 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:20,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:20,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:24:20,296 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:96 [2021-06-05 14:24:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370574373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:20,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:20,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:20,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792581634] [2021-06-05 14:24:20,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:20,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:20,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:20,401 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) [2021-06-05 14:24:21,043 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-06-05 14:24:21,360 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2021-06-05 14:24:21,691 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2021-06-05 14:24:21,902 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-05 14:24:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:21,985 INFO L93 Difference]: Finished difference Result 476 states and 1381 transitions. [2021-06-05 14:24:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:21,986 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 [2021-06-05 14:24:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:21,986 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:24:21,986 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 14:24:21,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1687.2ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:24:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 14:24:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 333. [2021-06-05 14:24:21,990 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) [2021-06-05 14:24:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-06-05 14:24:21,990 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-06-05 14:24:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:21,991 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-06-05 14:24:21,991 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) [2021-06-05 14:24:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-06-05 14:24:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:21,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:21,991 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:22,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5183,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:22,191 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 894124172, now seen corresponding path program 154 times [2021-06-05 14:24:22,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:22,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139670716] [2021-06-05 14:24:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:22,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:22,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139670716] [2021-06-05 14:24:22,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139670716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:22,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108044816] [2021-06-05 14:24:22,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:24:22,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:22,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:22,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:22,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,574 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 [2021-06-05 14:24:22,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,579 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 [2021-06-05 14:24:22,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,583 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 [2021-06-05 14:24:22,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,587 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 25 treesize of output 19 [2021-06-05 14:24:22,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,590 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 26 treesize of output 20 [2021-06-05 14:24:22,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,690 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:24:22,695 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. [2021-06-05 14:24:22,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-05 14:24:22,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:22,897 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 15 treesize of output 11 [2021-06-05 14:24:22,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:24:22,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:22,985 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-06-05 14:24:22,985 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:22,988 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 27 treesize of output 21 [2021-06-05 14:24:22,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:23,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:23,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:23,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:23,021 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 10 treesize of output 5 [2021-06-05 14:24:23,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:23,024 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 [2021-06-05 14:24:23,025 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:23,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:23,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:23,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:24:23,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:23,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:23,083 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1348 vanished before elimination [2021-06-05 14:24:23,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:23,085 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:24:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108044816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:23,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:23,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:23,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157210003] [2021-06-05 14:24:23,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:23,147 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) [2021-06-05 14:24:23,691 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 14:24:24,287 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-05 14:24:24,524 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-05 14:24:24,840 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-05 14:24:25,338 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-06-05 14:24:25,599 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 14:24:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:25,834 INFO L93 Difference]: Finished difference Result 690 states and 1971 transitions. [2021-06-05 14:24:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:24:25,834 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 [2021-06-05 14:24:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:25,835 INFO L225 Difference]: With dead ends: 690 [2021-06-05 14:24:25,835 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 14:24:25,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2576.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:24:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 14:24:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 350. [2021-06-05 14:24:25,839 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) [2021-06-05 14:24:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1070 transitions. [2021-06-05 14:24:25,840 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1070 transitions. Word has length 18 [2021-06-05 14:24:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:25,840 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1070 transitions. [2021-06-05 14:24:25,840 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) [2021-06-05 14:24:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1070 transitions. [2021-06-05 14:24:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:25,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:25,841 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:26,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5204 [2021-06-05 14:24:26,041 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:26,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1919605254, now seen corresponding path program 155 times [2021-06-05 14:24:26,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:26,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060536473] [2021-06-05 14:24:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:26,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:26,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060536473] [2021-06-05 14:24:26,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060536473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:26,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113641861] [2021-06-05 14:24:26,173 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 [2021-06-05 14:24:26,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:24:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,413 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 [2021-06-05 14:24:26,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,418 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 16 treesize of output 12 [2021-06-05 14:24:26,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,422 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 [2021-06-05 14:24:26,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,426 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 [2021-06-05 14:24:26,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,430 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 16 treesize of output 12 [2021-06-05 14:24:26,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:24:26,435 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,535 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:24:26,539 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. [2021-06-05 14:24:26,539 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-05 14:24:26,743 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1357], 1=[array_2, v_prenex_1356]} [2021-06-05 14:24:26,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:26,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,749 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 15 treesize of output 11 [2021-06-05 14:24:26,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,785 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:24:26,786 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 27 treesize of output 21 [2021-06-05 14:24:26,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:26,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:26,802 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:24:26,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:24:26,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:26,807 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 [2021-06-05 14:24:26,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:26,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:26,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:26,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:26,828 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-05 14:24:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:26,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113641861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:26,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:26,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:26,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591198248] [2021-06-05 14:24:26,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:26,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:26,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:26,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:26,852 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) [2021-06-05 14:24:27,431 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 14:24:27,854 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-06-05 14:24:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:29,039 INFO L93 Difference]: Finished difference Result 670 states and 1934 transitions. [2021-06-05 14:24:29,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:24:29,040 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 [2021-06-05 14:24:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:29,041 INFO L225 Difference]: With dead ends: 670 [2021-06-05 14:24:29,041 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 14:24:29,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 2009.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:24:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 14:24:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 343. [2021-06-05 14:24:29,046 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) [2021-06-05 14:24:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1046 transitions. [2021-06-05 14:24:29,047 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1046 transitions. Word has length 18 [2021-06-05 14:24:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:29,047 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1046 transitions. [2021-06-05 14:24:29,047 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) [2021-06-05 14:24:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1046 transitions. [2021-06-05 14:24:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:29,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:29,048 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:29,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-06-05 14:24:29,253 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1803907236, now seen corresponding path program 156 times [2021-06-05 14:24:29,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:29,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149106888] [2021-06-05 14:24:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:29,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:29,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149106888] [2021-06-05 14:24:29,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149106888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:29,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233835003] [2021-06-05 14:24:29,370 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 [2021-06-05 14:24:29,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:24:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:29,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,610 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 [2021-06-05 14:24:29,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,615 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 [2021-06-05 14:24:29,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,621 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 16 treesize of output 12 [2021-06-05 14:24:29,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,628 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 [2021-06-05 14:24:29,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,632 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 25 treesize of output 19 [2021-06-05 14:24:29,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,636 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 [2021-06-05 14:24:29,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,737 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-05 14:24:29,740 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. [2021-06-05 14:24:29,741 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-05 14:24:29,922 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1365], 1=[array_2, v_prenex_1364]} [2021-06-05 14:24:29,925 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 15 treesize of output 11 [2021-06-05 14:24:29,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,928 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 [2021-06-05 14:24:29,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,960 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:24:29,961 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 [2021-06-05 14:24:29,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:29,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:29,977 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:24:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,980 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 20 treesize of output 9 [2021-06-05 14:24:29,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:29,982 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 10 treesize of output 5 [2021-06-05 14:24:29,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:29,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:30,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:30,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:30,004 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-05 14:24:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233835003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:30,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:30,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:30,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110298653] [2021-06-05 14:24:30,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:30,028 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) [2021-06-05 14:24:30,564 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 14:24:31,245 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 14:24:31,691 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 14:24:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:32,170 INFO L93 Difference]: Finished difference Result 740 states and 2109 transitions. [2021-06-05 14:24:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:24:32,171 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 [2021-06-05 14:24:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:32,172 INFO L225 Difference]: With dead ends: 740 [2021-06-05 14:24:32,172 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 14:24:32,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1971.3ms TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:24:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 14:24:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 342. [2021-06-05 14:24:32,176 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) [2021-06-05 14:24:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1046 transitions. [2021-06-05 14:24:32,177 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1046 transitions. Word has length 18 [2021-06-05 14:24:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:32,177 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1046 transitions. [2021-06-05 14:24:32,177 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) [2021-06-05 14:24:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1046 transitions. [2021-06-05 14:24:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:32,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:32,177 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:32,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5253,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:32,378 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:32,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1605107838, now seen corresponding path program 157 times [2021-06-05 14:24:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:32,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585877299] [2021-06-05 14:24:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:32,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:32,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585877299] [2021-06-05 14:24:32,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585877299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:32,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527302074] [2021-06-05 14:24:32,500 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 [2021-06-05 14:24:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,624 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 [2021-06-05 14:24:32,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,627 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 [2021-06-05 14:24:32,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,631 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 24 treesize of output 18 [2021-06-05 14:24:32,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,680 INFO L628 ElimStorePlain]: treesize reduction 34, result has 63.8 percent of original size [2021-06-05 14:24:32,682 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. [2021-06-05 14:24:32,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-06-05 14:24:32,819 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1368], 1=[array_0, v_prenex_1367]} [2021-06-05 14:24:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:32,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:32,825 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 [2021-06-05 14:24:32,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,866 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:24:32,868 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 7 treesize of output 5 [2021-06-05 14:24:32,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:24:32,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:32,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:32,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:32,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1367 vanished before elimination [2021-06-05 14:24:32,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:32,911 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:24:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:32,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527302074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:32,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:32,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:24:32,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563215710] [2021-06-05 14:24:32,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:24:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:24:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:32,932 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) [2021-06-05 14:24:33,768 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 14:24:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:34,364 INFO L93 Difference]: Finished difference Result 627 states and 1829 transitions. [2021-06-05 14:24:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:24:34,364 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 [2021-06-05 14:24:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:34,365 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:24:34,365 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 14:24:34,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1193.2ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:24:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 14:24:34,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 367. [2021-06-05 14:24:34,370 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) [2021-06-05 14:24:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1134 transitions. [2021-06-05 14:24:34,371 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1134 transitions. Word has length 18 [2021-06-05 14:24:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:34,371 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1134 transitions. [2021-06-05 14:24:34,371 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) [2021-06-05 14:24:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1134 transitions. [2021-06-05 14:24:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:34,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:34,372 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:34,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-06-05 14:24:34,572 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash -343958516, now seen corresponding path program 158 times [2021-06-05 14:24:34,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:34,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036071208] [2021-06-05 14:24:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:34,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036071208] [2021-06-05 14:24:34,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036071208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080918612] [2021-06-05 14:24:34,661 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 [2021-06-05 14:24:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:34,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:34,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:34,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:34,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:34,762 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 25 treesize of output 19 [2021-06-05 14:24:34,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:34,765 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 [2021-06-05 14:24:34,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:34,805 INFO L628 ElimStorePlain]: treesize reduction 27, result has 68.2 percent of original size [2021-06-05 14:24:34,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:34,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-05 14:24:34,875 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 27 treesize of output 21 [2021-06-05 14:24:34,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:34,885 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:24:34,885 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:34,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:34,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:24:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:34,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080918612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:34,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:34,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:24:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30157701] [2021-06-05 14:24:34,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:24:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:34,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:24:34,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:24:34,905 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) [2021-06-05 14:24:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:35,246 INFO L93 Difference]: Finished difference Result 503 states and 1508 transitions. [2021-06-05 14:24:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:35,246 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 [2021-06-05 14:24:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:35,247 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:24:35,247 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 14:24:35,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 14:24:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 379. [2021-06-05 14:24:35,250 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) [2021-06-05 14:24:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1174 transitions. [2021-06-05 14:24:35,251 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1174 transitions. Word has length 18 [2021-06-05 14:24:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:35,251 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1174 transitions. [2021-06-05 14:24:35,251 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) [2021-06-05 14:24:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1174 transitions. [2021-06-05 14:24:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:35,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:35,252 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:35,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5292,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:35,452 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2011020034, now seen corresponding path program 159 times [2021-06-05 14:24:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064917912] [2021-06-05 14:24:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:35,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:35,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064917912] [2021-06-05 14:24:35,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064917912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:35,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139166148] [2021-06-05 14:24:35,533 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 [2021-06-05 14:24:35,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:24:35,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:35,629 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 24 treesize of output 18 [2021-06-05 14:24:35,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:35,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,635 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 [2021-06-05 14:24:35,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,678 INFO L628 ElimStorePlain]: treesize reduction 37, result has 64.1 percent of original size [2021-06-05 14:24:35,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:35,679 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-06-05 14:24:35,724 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1369], 1=[v_prenex_1370, array_4]} [2021-06-05 14:24:35,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:35,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,730 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 [2021-06-05 14:24:35,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,769 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-05 14:24:35,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:35,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:35,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:35,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:35,793 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 [2021-06-05 14:24:35,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:35,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:35,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:35,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:35,820 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:35,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:35,820 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-06-05 14:24:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:35,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139166148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:35,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:35,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:24:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859992886] [2021-06-05 14:24:35,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:24:35,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:35,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:24:35,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:24:35,885 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) [2021-06-05 14:24:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:36,211 INFO L93 Difference]: Finished difference Result 507 states and 1525 transitions. [2021-06-05 14:24:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:36,212 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 [2021-06-05 14:24:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:36,212 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:24:36,212 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:24:36,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:24:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 374. [2021-06-05 14:24:36,216 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) [2021-06-05 14:24:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1157 transitions. [2021-06-05 14:24:36,217 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1157 transitions. Word has length 18 [2021-06-05 14:24:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:36,217 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1157 transitions. [2021-06-05 14:24:36,217 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) [2021-06-05 14:24:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1157 transitions. [2021-06-05 14:24:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:36,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:36,217 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:36,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5301,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:36,418 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1137279354, now seen corresponding path program 160 times [2021-06-05 14:24:36,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:36,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114009953] [2021-06-05 14:24:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:36,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114009953] [2021-06-05 14:24:36,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114009953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:36,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911126194] [2021-06-05 14:24:36,495 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 [2021-06-05 14:24:36,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:36,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,626 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 [2021-06-05 14:24:36,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,629 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 25 treesize of output 19 [2021-06-05 14:24:36,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:36,650 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. [2021-06-05 14:24:36,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:70, output treesize:56 [2021-06-05 14:24:36,703 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:24:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,707 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 [2021-06-05 14:24:36,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:36,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,715 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 [2021-06-05 14:24:36,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,719 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 35 treesize of output 27 [2021-06-05 14:24:36,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:24:36,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,724 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 34 treesize of output 26 [2021-06-05 14:24:36,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,728 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 [2021-06-05 14:24:36,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,805 INFO L628 ElimStorePlain]: treesize reduction 218, result has 26.4 percent of original size [2021-06-05 14:24:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,808 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 [2021-06-05 14:24:36,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:36,811 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 [2021-06-05 14:24:36,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:36,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:36,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:36,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:36,841 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:24:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:36,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911126194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:36,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:36,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:36,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8612402] [2021-06-05 14:24:36,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:36,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:36,901 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) [2021-06-05 14:24:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:37,573 INFO L93 Difference]: Finished difference Result 547 states and 1651 transitions. [2021-06-05 14:24:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:37,573 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 [2021-06-05 14:24:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:37,574 INFO L225 Difference]: With dead ends: 547 [2021-06-05 14:24:37,574 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:24:37,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:24:37,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-06-05 14:24:37,578 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) [2021-06-05 14:24:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-06-05 14:24:37,578 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-06-05 14:24:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:37,578 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-06-05 14:24:37,578 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) [2021-06-05 14:24:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-06-05 14:24:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:37,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:37,579 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:37,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5311 [2021-06-05 14:24:37,779 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:37,780 INFO L82 PathProgramCache]: Analyzing trace with hash 193897062, now seen corresponding path program 161 times [2021-06-05 14:24:37,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:37,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009950052] [2021-06-05 14:24:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:37,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009950052] [2021-06-05 14:24:37,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009950052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519649647] [2021-06-05 14:24:37,864 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 [2021-06-05 14:24:37,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:38,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:38,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,025 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. [2021-06-05 14:24:38,025 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:24:38,104 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-05 14:24:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:38,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,111 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 25 treesize of output 19 [2021-06-05 14:24:38,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:38,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:38,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,205 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:24:38,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,208 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 11 treesize of output 3 [2021-06-05 14:24:38,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,212 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 [2021-06-05 14:24:38,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:38,222 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 9 treesize of output 3 [2021-06-05 14:24:38,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:38,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:38,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:38,256 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-05 14:24:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:38,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519649647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:38,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:38,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141245197] [2021-06-05 14:24:38,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:38,332 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) [2021-06-05 14:24:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:39,056 INFO L93 Difference]: Finished difference Result 537 states and 1622 transitions. [2021-06-05 14:24:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:39,057 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 [2021-06-05 14:24:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:39,058 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:24:39,058 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:24:39,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:24:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-06-05 14:24:39,062 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) [2021-06-05 14:24:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1189 transitions. [2021-06-05 14:24:39,062 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1189 transitions. Word has length 18 [2021-06-05 14:24:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:39,062 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1189 transitions. [2021-06-05 14:24:39,062 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) [2021-06-05 14:24:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1189 transitions. [2021-06-05 14:24:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:39,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:39,063 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:39,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5322 [2021-06-05 14:24:39,263 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1675134932, now seen corresponding path program 162 times [2021-06-05 14:24:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:39,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508020064] [2021-06-05 14:24:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:39,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:39,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508020064] [2021-06-05 14:24:39,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508020064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:39,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485356583] [2021-06-05 14:24:39,344 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 [2021-06-05 14:24:39,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:24:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:39,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:39,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:39,446 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 [2021-06-05 14:24:39,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,449 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 15 treesize of output 11 [2021-06-05 14:24:39,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:39,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:39,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-05 14:24:39,514 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1373], 1=[v_prenex_1374, array_4]} [2021-06-05 14:24:39,516 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 17 treesize of output 13 [2021-06-05 14:24:39,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:39,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,556 INFO L628 ElimStorePlain]: treesize reduction 62, result has 44.1 percent of original size [2021-06-05 14:24:39,558 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 [2021-06-05 14:24:39,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:39,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:39,580 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 [2021-06-05 14:24:39,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,582 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 21 treesize of output 7 [2021-06-05 14:24:39,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:39,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:39,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:39,607 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:39,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:39,608 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:125, output treesize:38 [2021-06-05 14:24:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:39,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485356583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:39,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:39,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640974339] [2021-06-05 14:24:39,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:39,670 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) [2021-06-05 14:24:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:40,107 INFO L93 Difference]: Finished difference Result 578 states and 1733 transitions. [2021-06-05 14:24:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:24:40,108 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 [2021-06-05 14:24:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:40,109 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:24:40,109 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:24:40,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:24:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:24:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 388. [2021-06-05 14:24:40,115 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) [2021-06-05 14:24:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1213 transitions. [2021-06-05 14:24:40,116 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1213 transitions. Word has length 18 [2021-06-05 14:24:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:40,116 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1213 transitions. [2021-06-05 14:24:40,116 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) [2021-06-05 14:24:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1213 transitions. [2021-06-05 14:24:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:40,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:40,116 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:40,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:40,317 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 4158916, now seen corresponding path program 163 times [2021-06-05 14:24:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830927557] [2021-06-05 14:24:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:40,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:40,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830927557] [2021-06-05 14:24:40,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830927557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:40,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481414584] [2021-06-05 14:24:40,394 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 [2021-06-05 14:24:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:40,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:40,496 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 25 treesize of output 19 [2021-06-05 14:24:40,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,499 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 15 treesize of output 11 [2021-06-05 14:24:40,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:40,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:40,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:40,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-05 14:24:40,581 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 [2021-06-05 14:24:40,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:40,591 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:24:40,591 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:40,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:40,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:24:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481414584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:40,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:40,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091562934] [2021-06-05 14:24:40,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:40,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:40,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:40,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:40,612 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) [2021-06-05 14:24:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:41,012 INFO L93 Difference]: Finished difference Result 536 states and 1614 transitions. [2021-06-05 14:24:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:24:41,012 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 [2021-06-05 14:24:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:41,013 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:24:41,013 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:24:41,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:24:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:24:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 376. [2021-06-05 14:24:41,016 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) [2021-06-05 14:24:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-06-05 14:24:41,017 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-06-05 14:24:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:41,017 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-06-05 14:24:41,017 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) [2021-06-05 14:24:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-06-05 14:24:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:41,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:41,018 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:41,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:41,218 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1103680126, now seen corresponding path program 164 times [2021-06-05 14:24:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:41,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738794870] [2021-06-05 14:24:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:41,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738794870] [2021-06-05 14:24:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738794870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652546367] [2021-06-05 14:24:41,307 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 [2021-06-05 14:24:41,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:41,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:41,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,450 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 [2021-06-05 14:24:41,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:41,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:41,477 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. [2021-06-05 14:24:41,477 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-05 14:24:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:24:41,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,599 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 15 treesize of output 11 [2021-06-05 14:24:41,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,652 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:24:41,652 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:41,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,654 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 [2021-06-05 14:24:41,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:41,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:41,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:41,681 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 21 treesize of output 7 [2021-06-05 14:24:41,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,684 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 11 treesize of output 3 [2021-06-05 14:24:41,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:41,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:41,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:41,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:41,713 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-05 14:24:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652546367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:41,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:41,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598178113] [2021-06-05 14:24:41,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:41,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:41,775 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) [2021-06-05 14:24:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:42,579 INFO L93 Difference]: Finished difference Result 587 states and 1767 transitions. [2021-06-05 14:24:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:24:42,579 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 [2021-06-05 14:24:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:42,580 INFO L225 Difference]: With dead ends: 587 [2021-06-05 14:24:42,580 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:24:42,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:24:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 377. [2021-06-05 14:24:42,586 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) [2021-06-05 14:24:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-06-05 14:24:42,587 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-06-05 14:24:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:42,587 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-06-05 14:24:42,587 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) [2021-06-05 14:24:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-06-05 14:24:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:42,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:42,588 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:42,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5354 [2021-06-05 14:24:42,809 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1115191326, now seen corresponding path program 165 times [2021-06-05 14:24:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380571804] [2021-06-05 14:24:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:43,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380571804] [2021-06-05 14:24:43,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380571804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955382107] [2021-06-05 14:24:43,028 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 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 [2021-06-05 14:24:43,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:24:43,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:43,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,270 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 26 treesize of output 20 [2021-06-05 14:24:43,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,274 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 16 treesize of output 12 [2021-06-05 14:24:43,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,278 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 16 treesize of output 12 [2021-06-05 14:24:43,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,282 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 [2021-06-05 14:24:43,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:43,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:43,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,388 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:24:43,392 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. [2021-06-05 14:24:43,392 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:24:43,572 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:24:43,574 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 [2021-06-05 14:24:43,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,576 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 27 treesize of output 21 [2021-06-05 14:24:43,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:43,598 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:24:43,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:43,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:43,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:43,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:43,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:43,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:24:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:43,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955382107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:43,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:43,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:43,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986190538] [2021-06-05 14:24:43,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:43,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:43,632 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) [2021-06-05 14:24:43,975 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-05 14:24:44,181 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 14:24:44,444 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 14:24:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:44,623 INFO L93 Difference]: Finished difference Result 584 states and 1727 transitions. [2021-06-05 14:24:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:44,623 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 [2021-06-05 14:24:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:44,624 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:24:44,624 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:24:44,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1136.3ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:24:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 380. [2021-06-05 14:24:44,628 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) [2021-06-05 14:24:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1186 transitions. [2021-06-05 14:24:44,629 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1186 transitions. Word has length 18 [2021-06-05 14:24:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:44,629 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1186 transitions. [2021-06-05 14:24:44,629 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) [2021-06-05 14:24:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1186 transitions. [2021-06-05 14:24:44,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:44,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:44,629 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:44,830 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -833875028, now seen corresponding path program 166 times [2021-06-05 14:24:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:44,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609736528] [2021-06-05 14:24:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:44,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:44,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609736528] [2021-06-05 14:24:44,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609736528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:44,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705880240] [2021-06-05 14:24:44,942 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 [2021-06-05 14:24:44,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:44,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,178 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 [2021-06-05 14:24:45,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,182 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 26 treesize of output 20 [2021-06-05 14:24:45,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,186 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 16 treesize of output 12 [2021-06-05 14:24:45,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,190 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 25 treesize of output 19 [2021-06-05 14:24:45,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,194 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 16 treesize of output 12 [2021-06-05 14:24:45,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:45,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,295 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:24:45,299 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. [2021-06-05 14:24:45,299 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:24:45,505 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:24:45,508 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 25 treesize of output 19 [2021-06-05 14:24:45,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,510 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 27 treesize of output 21 [2021-06-05 14:24:45,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:45,532 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:24:45,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:45,533 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 21 treesize of output 7 [2021-06-05 14:24:45,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:45,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:45,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:45,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:24:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705880240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:45,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:45,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494104711] [2021-06-05 14:24:45,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:45,563 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) [2021-06-05 14:24:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:46,408 INFO L93 Difference]: Finished difference Result 587 states and 1756 transitions. [2021-06-05 14:24:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:24:46,408 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 [2021-06-05 14:24:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:46,409 INFO L225 Difference]: With dead ends: 587 [2021-06-05 14:24:46,409 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 14:24:46,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:24:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 14:24:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 382. [2021-06-05 14:24:46,413 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) [2021-06-05 14:24:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1191 transitions. [2021-06-05 14:24:46,414 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1191 transitions. Word has length 18 [2021-06-05 14:24:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:46,414 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1191 transitions. [2021-06-05 14:24:46,414 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) [2021-06-05 14:24:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1191 transitions. [2021-06-05 14:24:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:46,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:46,414 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:46,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5387 [2021-06-05 14:24:46,615 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash 647362842, now seen corresponding path program 167 times [2021-06-05 14:24:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:46,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731809571] [2021-06-05 14:24:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:46,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731809571] [2021-06-05 14:24:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731809571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870500182] [2021-06-05 14:24:46,741 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 [2021-06-05 14:24:46,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:46,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:46,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:46,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:46,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,988 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 16 treesize of output 12 [2021-06-05 14:24:46,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,993 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 [2021-06-05 14:24:46,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:46,997 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 16 treesize of output 12 [2021-06-05 14:24:46,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,001 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 26 treesize of output 20 [2021-06-05 14:24:47,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:47,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,103 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:24:47,106 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. [2021-06-05 14:24:47,107 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-05 14:24:47,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,274 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 [2021-06-05 14:24:47,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,278 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 [2021-06-05 14:24:47,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:47,349 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-05 14:24:47,352 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 7 treesize of output 5 [2021-06-05 14:24:47,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:47,381 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 11 treesize of output 3 [2021-06-05 14:24:47,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:47,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,419 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 7 treesize of output 5 [2021-06-05 14:24:47,419 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:47,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:47,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1397 vanished before elimination [2021-06-05 14:24:47,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1399 vanished before elimination [2021-06-05 14:24:47,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:47,445 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:24:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:47,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870500182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:47,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:47,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:47,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123399618] [2021-06-05 14:24:47,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:47,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:47,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:47,507 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) [2021-06-05 14:24:48,326 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-05 14:24:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:48,458 INFO L93 Difference]: Finished difference Result 586 states and 1754 transitions. [2021-06-05 14:24:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:24:48,458 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 [2021-06-05 14:24:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:48,459 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:24:48,459 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:24:48,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1023.0ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:24:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:24:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 377. [2021-06-05 14:24:48,463 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) [2021-06-05 14:24:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-06-05 14:24:48,463 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-06-05 14:24:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:48,464 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-06-05 14:24:48,464 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) [2021-06-05 14:24:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-06-05 14:24:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:48,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:48,464 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:48,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:48,665 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1906960408, now seen corresponding path program 168 times [2021-06-05 14:24:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:48,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424515186] [2021-06-05 14:24:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:48,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:48,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424515186] [2021-06-05 14:24:48,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424515186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:48,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848136079] [2021-06-05 14:24:48,786 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 [2021-06-05 14:24:48,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:24:48,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:48,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:49,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:49,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:49,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,087 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 15 treesize of output 11 [2021-06-05 14:24:49,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,091 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 25 treesize of output 19 [2021-06-05 14:24:49,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,096 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 26 treesize of output 20 [2021-06-05 14:24:49,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,100 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 16 treesize of output 12 [2021-06-05 14:24:49,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,214 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:24:49,215 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:49,219 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. [2021-06-05 14:24:49,219 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:49,378 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:24:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:49,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,383 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 27 treesize of output 21 [2021-06-05 14:24:49,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:49,405 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:24:49,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:49,407 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 [2021-06-05 14:24:49,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:49,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:49,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:49,420 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:24:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848136079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:49,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:49,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:49,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392641436] [2021-06-05 14:24:49,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:49,442 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) [2021-06-05 14:24:50,071 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-05 14:24:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:50,280 INFO L93 Difference]: Finished difference Result 555 states and 1679 transitions. [2021-06-05 14:24:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:24:50,281 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 [2021-06-05 14:24:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:50,281 INFO L225 Difference]: With dead ends: 555 [2021-06-05 14:24:50,281 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:24:50,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 985.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:24:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:24:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 381. [2021-06-05 14:24:50,285 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) [2021-06-05 14:24:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1189 transitions. [2021-06-05 14:24:50,286 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1189 transitions. Word has length 18 [2021-06-05 14:24:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1189 transitions. [2021-06-05 14:24:50,286 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) [2021-06-05 14:24:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1189 transitions. [2021-06-05 14:24:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:50,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:50,286 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:50,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5429,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:50,487 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:50,487 INFO L82 PathProgramCache]: Analyzing trace with hash -425722538, now seen corresponding path program 169 times [2021-06-05 14:24:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:50,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978239406] [2021-06-05 14:24:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:50,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:50,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978239406] [2021-06-05 14:24:50,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978239406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:50,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250957101] [2021-06-05 14:24:50,616 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 [2021-06-05 14:24:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:50,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,904 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 16 treesize of output 12 [2021-06-05 14:24:50,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,909 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 [2021-06-05 14:24:50,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,913 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 [2021-06-05 14:24:50,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,917 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 25 treesize of output 19 [2021-06-05 14:24:50,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,921 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 [2021-06-05 14:24:50,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:50,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:50,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:50,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,036 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:24:51,036 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:24:51,040 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. [2021-06-05 14:24:51,040 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:24:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,171 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 17 treesize of output 13 [2021-06-05 14:24:51,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,175 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 15 treesize of output 11 [2021-06-05 14:24:51,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,236 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-05 14:24:51,237 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:51,239 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 27 treesize of output 21 [2021-06-05 14:24:51,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:51,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,270 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 21 treesize of output 7 [2021-06-05 14:24:51,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:51,274 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 11 treesize of output 3 [2021-06-05 14:24:51,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:24:51,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:51,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:51,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1414 vanished before elimination [2021-06-05 14:24:51,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:24:51,334 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:24:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:51,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250957101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:51,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:51,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580523188] [2021-06-05 14:24:51,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:51,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:51,396 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) [2021-06-05 14:24:51,880 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-05 14:24:52,013 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 14:24:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:52,253 INFO L93 Difference]: Finished difference Result 528 states and 1598 transitions. [2021-06-05 14:24:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:52,253 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 [2021-06-05 14:24:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:52,254 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:24:52,254 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:24:52,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1030.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:24:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:24:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 379. [2021-06-05 14:24:52,258 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) [2021-06-05 14:24:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1184 transitions. [2021-06-05 14:24:52,258 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1184 transitions. Word has length 18 [2021-06-05 14:24:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:52,258 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1184 transitions. [2021-06-05 14:24:52,259 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) [2021-06-05 14:24:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1184 transitions. [2021-06-05 14:24:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:52,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:52,259 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:52,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5445,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:52,460 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1741879842, now seen corresponding path program 170 times [2021-06-05 14:24:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:52,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405131275] [2021-06-05 14:24:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:52,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:52,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405131275] [2021-06-05 14:24:52,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405131275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:52,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009836200] [2021-06-05 14:24:52,631 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 [2021-06-05 14:24:52,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:24:52,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:52,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:52,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:52,991 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 17 treesize of output 13 [2021-06-05 14:24:52,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:52,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:52,995 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 [2021-06-05 14:24:52,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,055 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 [2021-06-05 14:24:53,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,059 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 [2021-06-05 14:24:53,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,117 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 [2021-06-05 14:24:53,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:53,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,121 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 [2021-06-05 14:24:53,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,181 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. [2021-06-05 14:24:53,181 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:24:53,347 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:24:53,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,359 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 25 treesize of output 19 [2021-06-05 14:24:53,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,364 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 17 treesize of output 13 [2021-06-05 14:24:53,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,368 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 28 treesize of output 22 [2021-06-05 14:24:53,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:53,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,378 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 20 treesize of output 16 [2021-06-05 14:24:53,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,383 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 19 treesize of output 15 [2021-06-05 14:24:53,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,387 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 [2021-06-05 14:24:53,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:24:53,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,397 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 18 treesize of output 14 [2021-06-05 14:24:53,397 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,401 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 26 treesize of output 20 [2021-06-05 14:24:53,402 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,406 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 [2021-06-05 14:24:53,407 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,410 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 29 treesize of output 23 [2021-06-05 14:24:53,411 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,551 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 14:24:53,551 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-06-05 14:24:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,555 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 11 treesize of output 3 [2021-06-05 14:24:53,555 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 14:24:53,559 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:53,562 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 21 treesize of output 7 [2021-06-05 14:24:53,563 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:53,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:53,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:24:53,616 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-05 14:24:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:53,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009836200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:53,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:53,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531039347] [2021-06-05 14:24:53,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:53,701 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) [2021-06-05 14:24:54,475 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2021-06-05 14:24:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:54,734 INFO L93 Difference]: Finished difference Result 556 states and 1682 transitions. [2021-06-05 14:24:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:24:54,735 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 [2021-06-05 14:24:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:54,736 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:24:54,736 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:24:54,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:24:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:24:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 374. [2021-06-05 14:24:54,739 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) [2021-06-05 14:24:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1172 transitions. [2021-06-05 14:24:54,740 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1172 transitions. Word has length 18 [2021-06-05 14:24:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:54,740 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1172 transitions. [2021-06-05 14:24:54,740 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) [2021-06-05 14:24:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1172 transitions. [2021-06-05 14:24:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:54,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:54,740 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:54,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5467,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:54,941 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1529859260, now seen corresponding path program 171 times [2021-06-05 14:24:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:54,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519244184] [2021-06-05 14:24:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:55,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:55,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519244184] [2021-06-05 14:24:55,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519244184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:55,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127694547] [2021-06-05 14:24:55,034 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 [2021-06-05 14:24:55,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:24:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:55,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:55,128 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 15 treesize of output 11 [2021-06-05 14:24:55,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:55,131 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 25 treesize of output 19 [2021-06-05 14:24:55,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,134 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 24 treesize of output 18 [2021-06-05 14:24:55,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:55,169 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-06-05 14:24:55,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:55,170 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-05 14:24:55,251 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 27 treesize of output 21 [2021-06-05 14:24:55,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:55,261 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:24:55,261 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:55,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:55,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:24:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:55,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127694547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:55,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:55,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:55,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100410326] [2021-06-05 14:24:55,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:55,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:55,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:55,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:55,280 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) [2021-06-05 14:24:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:55,653 INFO L93 Difference]: Finished difference Result 582 states and 1750 transitions. [2021-06-05 14:24:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:55,653 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 [2021-06-05 14:24:55,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:55,654 INFO L225 Difference]: With dead ends: 582 [2021-06-05 14:24:55,654 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:24:55,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:24:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 378. [2021-06-05 14:24:55,658 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) [2021-06-05 14:24:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1192 transitions. [2021-06-05 14:24:55,659 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1192 transitions. Word has length 18 [2021-06-05 14:24:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:55,659 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1192 transitions. [2021-06-05 14:24:55,659 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) [2021-06-05 14:24:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1192 transitions. [2021-06-05 14:24:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:55,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:55,660 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5496 [2021-06-05 14:24:55,860 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -673363314, now seen corresponding path program 172 times [2021-06-05 14:24:55,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:55,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605387264] [2021-06-05 14:24:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:55,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:55,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605387264] [2021-06-05 14:24:55,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605387264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:55,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156052657] [2021-06-05 14:24:55,965 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 [2021-06-05 14:24:55,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:24:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:56,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,092 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 [2021-06-05 14:24:56,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,096 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 24 treesize of output 18 [2021-06-05 14:24:56,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:56,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,147 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.2 percent of original size [2021-06-05 14:24:56,149 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. [2021-06-05 14:24:56,149 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-06-05 14:24:56,305 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1427, array_4], 1=[array_0, v_prenex_1426]} [2021-06-05 14:24:56,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:56,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:56,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:56,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,351 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:24:56,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:24:56,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:56,369 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:24:56,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,372 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 11 treesize of output 3 [2021-06-05 14:24:56,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:56,374 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 21 treesize of output 7 [2021-06-05 14:24:56,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:56,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:56,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:56,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:24:56,396 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:24:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:56,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156052657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:56,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:56,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:24:56,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670466737] [2021-06-05 14:24:56,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:24:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:24:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:24:56,418 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) [2021-06-05 14:24:56,986 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 14:24:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:57,126 INFO L93 Difference]: Finished difference Result 579 states and 1746 transitions. [2021-06-05 14:24:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:57,127 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 [2021-06-05 14:24:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:57,127 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:24:57,127 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:24:57,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:24:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:24:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 381. [2021-06-05 14:24:57,132 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) [2021-06-05 14:24:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1204 transitions. [2021-06-05 14:24:57,132 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1204 transitions. Word has length 18 [2021-06-05 14:24:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:57,132 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1204 transitions. [2021-06-05 14:24:57,132 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) [2021-06-05 14:24:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1204 transitions. [2021-06-05 14:24:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:57,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:57,133 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:57,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5502,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:57,333 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1681615236, now seen corresponding path program 173 times [2021-06-05 14:24:57,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:57,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648653375] [2021-06-05 14:24:57,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:57,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648653375] [2021-06-05 14:24:57,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648653375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122029504] [2021-06-05 14:24:57,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:24:57,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:24:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:57,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:57,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,527 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 25 treesize of output 19 [2021-06-05 14:24:57,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:24:57,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,565 INFO L628 ElimStorePlain]: treesize reduction 28, result has 63.2 percent of original size [2021-06-05 14:24:57,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:57,566 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-05 14:24:57,647 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1428, array_0], 1=[v_prenex_1429, array_4]} [2021-06-05 14:24:57,650 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 15 treesize of output 11 [2021-06-05 14:24:57,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,653 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 25 treesize of output 19 [2021-06-05 14:24:57,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,690 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-06-05 14:24:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:57,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:57,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,710 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1429 vanished before elimination [2021-06-05 14:24:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:57,713 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 11 treesize of output 3 [2021-06-05 14:24:57,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:57,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:57,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:57,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:57,739 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-05 14:24:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:57,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122029504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:57,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:57,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:57,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376525228] [2021-06-05 14:24:57,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:57,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:57,798 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) [2021-06-05 14:24:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:58,189 INFO L93 Difference]: Finished difference Result 585 states and 1770 transitions. [2021-06-05 14:24:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:58,190 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 [2021-06-05 14:24:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:58,191 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:24:58,191 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 14:24:58,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:24:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 14:24:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 370. [2021-06-05 14:24:58,195 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) [2021-06-05 14:24:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1165 transitions. [2021-06-05 14:24:58,196 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1165 transitions. Word has length 18 [2021-06-05 14:24:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:58,196 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1165 transitions. [2021-06-05 14:24:58,196 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) [2021-06-05 14:24:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1165 transitions. [2021-06-05 14:24:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:58,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:58,196 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:58,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-05 14:24:58,397 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 816041682, now seen corresponding path program 174 times [2021-06-05 14:24:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670628262] [2021-06-05 14:24:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:58,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:58,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670628262] [2021-06-05 14:24:58,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670628262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:58,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132344122] [2021-06-05 14:24:58,493 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 [2021-06-05 14:24:58,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:24:58,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:24:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:58,603 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 24 treesize of output 18 [2021-06-05 14:24:58,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:58,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:58,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:58,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:58,651 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.0 percent of original size [2021-06-05 14:24:58,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:58,652 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-06-05 14:24:58,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:24:58,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:24:58,732 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:24:58,732 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:24:58,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:58,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:24:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:58,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132344122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:58,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:58,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:58,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723944121] [2021-06-05 14:24:58,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:58,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:58,751 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) [2021-06-05 14:24:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:58,984 INFO L93 Difference]: Finished difference Result 537 states and 1634 transitions. [2021-06-05 14:24:58,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:58,984 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 [2021-06-05 14:24:58,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:58,985 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:24:58,985 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:24:58,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:24:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-06-05 14:24:58,988 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) [2021-06-05 14:24:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1205 transitions. [2021-06-05 14:24:58,989 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1205 transitions. Word has length 18 [2021-06-05 14:24:58,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:58,989 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1205 transitions. [2021-06-05 14:24:58,989 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) [2021-06-05 14:24:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1205 transitions. [2021-06-05 14:24:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:58,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:58,990 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:24:59,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:24:59,190 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:24:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:24:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1123947064, now seen corresponding path program 175 times [2021-06-05 14:24:59,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:24:59,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315318264] [2021-06-05 14:24:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:24:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:24:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315318264] [2021-06-05 14:24:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315318264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582742874] [2021-06-05 14:24:59,279 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 [2021-06-05 14:24:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:24:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:24:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:24:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,389 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 18 [2021-06-05 14:24:59,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,392 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 25 treesize of output 19 [2021-06-05 14:24:59,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:24:59,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,440 INFO L628 ElimStorePlain]: treesize reduction 33, result has 63.7 percent of original size [2021-06-05 14:24:59,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:59,441 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-05 14:24:59,485 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1430], 1=[array_4, v_prenex_1431]} [2021-06-05 14:24:59,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:24:59,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:24:59,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:24:59,551 INFO L628 ElimStorePlain]: treesize reduction 142, result has 34.0 percent of original size [2021-06-05 14:24:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:24:59,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:24:59,573 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 21 treesize of output 7 [2021-06-05 14:24:59,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:24:59,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:24:59,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:24:59,600 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1431 vanished before elimination [2021-06-05 14:24:59,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:24:59,600 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-05 14:24:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:24:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582742874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:24:59,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:24:59,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:24:59,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293007663] [2021-06-05 14:24:59,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:24:59,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:24:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:24:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:24:59,662 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) [2021-06-05 14:24:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:24:59,938 INFO L93 Difference]: Finished difference Result 541 states and 1651 transitions. [2021-06-05 14:24:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:24:59,939 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 18 [2021-06-05 14:24:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:24:59,940 INFO L225 Difference]: With dead ends: 541 [2021-06-05 14:24:59,940 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:24:59,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:24:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:24:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 376. [2021-06-05 14:24:59,943 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) [2021-06-05 14:24:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1183 transitions. [2021-06-05 14:24:59,944 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1183 transitions. Word has length 18 [2021-06-05 14:24:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:24:59,944 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1183 transitions. [2021-06-05 14:24:59,944 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) [2021-06-05 14:24:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1183 transitions. [2021-06-05 14:24:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:24:59,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:24:59,945 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:00,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-05 14:25:00,145 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1997687744, now seen corresponding path program 176 times [2021-06-05 14:25:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:00,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406751566] [2021-06-05 14:25:00,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:00,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406751566] [2021-06-05 14:25:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406751566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967096438] [2021-06-05 14:25:00,235 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 [2021-06-05 14:25:00,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:00,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,376 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 [2021-06-05 14:25:00,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,379 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 [2021-06-05 14:25:00,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,406 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. [2021-06-05 14:25:00,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:25:00,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,472 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 27 treesize of output 21 [2021-06-05 14:25:00,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:00,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:00,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,536 INFO L628 ElimStorePlain]: treesize reduction 74, result has 51.6 percent of original size [2021-06-05 14:25:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:00,539 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 21 treesize of output 7 [2021-06-05 14:25:00,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,543 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 [2021-06-05 14:25:00,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,576 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 7 treesize of output 5 [2021-06-05 14:25:00,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:00,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:00,598 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1434 vanished before elimination [2021-06-05 14:25:00,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:00,600 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-05 14:25:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:00,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967096438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:00,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:00,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:00,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974867019] [2021-06-05 14:25:00,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:00,665 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) [2021-06-05 14:25:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:01,164 INFO L93 Difference]: Finished difference Result 549 states and 1677 transitions. [2021-06-05 14:25:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:25:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:01,165 INFO L225 Difference]: With dead ends: 549 [2021-06-05 14:25:01,165 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:25:01,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:25:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 373. [2021-06-05 14:25:01,168 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) [2021-06-05 14:25:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1179 transitions. [2021-06-05 14:25:01,169 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1179 transitions. Word has length 18 [2021-06-05 14:25:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:01,169 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1179 transitions. [2021-06-05 14:25:01,169 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) [2021-06-05 14:25:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1179 transitions. [2021-06-05 14:25:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:01,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:01,170 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:01,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-06-05 14:25:01,370 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1271693822, now seen corresponding path program 177 times [2021-06-05 14:25:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:01,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589708538] [2021-06-05 14:25:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:01,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:01,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589708538] [2021-06-05 14:25:01,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589708538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:01,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969376308] [2021-06-05 14:25:01,568 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 [2021-06-05 14:25:01,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:25:01,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:01,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:01,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,703 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 [2021-06-05 14:25:01,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,707 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 26 treesize of output 20 [2021-06-05 14:25:01,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:01,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:01,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:01,714 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 16 treesize of output 12 [2021-06-05 14:25:01,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:01,781 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-05 14:25:01,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:01,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-05 14:25:02,065 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1440, array_4], 1=[v_prenex_1439, array_0]} [2021-06-05 14:25:02,068 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 17 treesize of output 13 [2021-06-05 14:25:02,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,071 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 15 treesize of output 11 [2021-06-05 14:25:02,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,102 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-05 14:25:02,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:02,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:02,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1439 vanished before elimination [2021-06-05 14:25:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:02,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:02,125 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 21 treesize of output 7 [2021-06-05 14:25:02,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:02,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:02,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:02,147 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:25:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:02,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969376308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:02,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:02,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:02,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782102077] [2021-06-05 14:25:02,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:02,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:02,171 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) [2021-06-05 14:25:02,538 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 14:25:02,775 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 14:25:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:03,819 INFO L93 Difference]: Finished difference Result 681 states and 1992 transitions. [2021-06-05 14:25:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:03,819 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 [2021-06-05 14:25:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:03,820 INFO L225 Difference]: With dead ends: 681 [2021-06-05 14:25:03,820 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 14:25:03,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1522.7ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 14:25:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 380. [2021-06-05 14:25:03,827 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) [2021-06-05 14:25:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1207 transitions. [2021-06-05 14:25:03,828 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1207 transitions. Word has length 18 [2021-06-05 14:25:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:03,828 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1207 transitions. [2021-06-05 14:25:03,828 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) [2021-06-05 14:25:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1207 transitions. [2021-06-05 14:25:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:03,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:03,829 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:04,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5564,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:04,051 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1074207120, now seen corresponding path program 178 times [2021-06-05 14:25:04,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:04,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830992827] [2021-06-05 14:25:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:04,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830992827] [2021-06-05 14:25:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830992827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75619264] [2021-06-05 14:25:04,276 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 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 [2021-06-05 14:25:04,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:04,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,392 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 26 treesize of output 20 [2021-06-05 14:25:04,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,396 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 25 treesize of output 19 [2021-06-05 14:25:04,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,399 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 16 treesize of output 12 [2021-06-05 14:25:04,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,465 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-05 14:25:04,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:04,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-05 14:25:04,766 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1446], 1=[array_0, v_prenex_1445]} [2021-06-05 14:25:04,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:04,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:04,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,814 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:25:04,817 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 7 treesize of output 5 [2021-06-05 14:25:04,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:04,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:04,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:04,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:04,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:04,859 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1445 vanished before elimination [2021-06-05 14:25:04,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:04,860 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:25:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75619264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253472182] [2021-06-05 14:25:04,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:04,883 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) [2021-06-05 14:25:05,401 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-06-05 14:25:05,552 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-05 14:25:05,756 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-06-05 14:25:05,934 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-06-05 14:25:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:06,534 INFO L93 Difference]: Finished difference Result 634 states and 1894 transitions. [2021-06-05 14:25:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:25:06,535 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 [2021-06-05 14:25:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:06,536 INFO L225 Difference]: With dead ends: 634 [2021-06-05 14:25:06,536 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 14:25:06,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1625.3ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:25:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 14:25:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 383. [2021-06-05 14:25:06,540 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) [2021-06-05 14:25:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1219 transitions. [2021-06-05 14:25:06,541 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1219 transitions. Word has length 18 [2021-06-05 14:25:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:06,541 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1219 transitions. [2021-06-05 14:25:06,541 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) [2021-06-05 14:25:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1219 transitions. [2021-06-05 14:25:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:06,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:06,541 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:06,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5579,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:06,742 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash -534377150, now seen corresponding path program 179 times [2021-06-05 14:25:06,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:06,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405635922] [2021-06-05 14:25:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:06,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:06,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405635922] [2021-06-05 14:25:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405635922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024026453] [2021-06-05 14:25:06,882 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 [2021-06-05 14:25:06,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:06,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 14:25:06,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:06,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,994 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 25 treesize of output 19 [2021-06-05 14:25:06,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:06,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:06,998 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 [2021-06-05 14:25:06,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,002 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 [2021-06-05 14:25:07,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:25:07,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,006 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 15 treesize of output 11 [2021-06-05 14:25:07,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,114 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:25:07,115 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.8 percent of original size [2021-06-05 14:25:07,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:07,116 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-05 14:25:07,605 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-05 14:25:07,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,611 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 28 treesize of output 22 [2021-06-05 14:25:07,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,616 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 25 treesize of output 19 [2021-06-05 14:25:07,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,622 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 27 treesize of output 21 [2021-06-05 14:25:07,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,627 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 [2021-06-05 14:25:07,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,632 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 28 treesize of output 22 [2021-06-05 14:25:07,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:07,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,638 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 15 treesize of output 11 [2021-06-05 14:25:07,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,644 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 [2021-06-05 14:25:07,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,649 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 16 treesize of output 12 [2021-06-05 14:25:07,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,654 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 26 treesize of output 20 [2021-06-05 14:25:07,655 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,660 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 [2021-06-05 14:25:07,661 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,666 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 [2021-06-05 14:25:07,666 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,671 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 [2021-06-05 14:25:07,672 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,676 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 [2021-06-05 14:25:07,677 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,681 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 [2021-06-05 14:25:07,682 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,831 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 14:25:07,831 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:25:07,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,835 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 20 treesize of output 9 [2021-06-05 14:25:07,836 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:07,840 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 20 treesize of output 9 [2021-06-05 14:25:07,852 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:07,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:07,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:25:07,911 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:25:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:07,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024026453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:07,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:07,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:07,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225233598] [2021-06-05 14:25:07,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:07,997 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) [2021-06-05 14:25:08,352 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 14:25:08,621 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2021-06-05 14:25:08,967 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 119 [2021-06-05 14:25:09,302 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 114 [2021-06-05 14:25:09,606 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2021-06-05 14:25:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:09,662 INFO L93 Difference]: Finished difference Result 597 states and 1799 transitions. [2021-06-05 14:25:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:09,662 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 [2021-06-05 14:25:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:09,663 INFO L225 Difference]: With dead ends: 597 [2021-06-05 14:25:09,663 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 14:25:09,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1838.0ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 14:25:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 385. [2021-06-05 14:25:09,667 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) [2021-06-05 14:25:09,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1224 transitions. [2021-06-05 14:25:09,668 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1224 transitions. Word has length 18 [2021-06-05 14:25:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:09,668 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1224 transitions. [2021-06-05 14:25:09,668 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) [2021-06-05 14:25:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1224 transitions. [2021-06-05 14:25:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:09,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:09,669 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:09,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-06-05 14:25:09,869 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1739522306, now seen corresponding path program 180 times [2021-06-05 14:25:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:09,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664224230] [2021-06-05 14:25:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:10,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664224230] [2021-06-05 14:25:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664224230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883146160] [2021-06-05 14:25:10,106 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 [2021-06-05 14:25:10,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:25:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:10,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:10,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,221 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 15 treesize of output 11 [2021-06-05 14:25:10,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,224 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 26 treesize of output 20 [2021-06-05 14:25:10,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,228 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 25 treesize of output 19 [2021-06-05 14:25:10,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,231 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 [2021-06-05 14:25:10,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,296 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-05 14:25:10,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:10,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-05 14:25:10,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,562 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 [2021-06-05 14:25:10,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,567 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 [2021-06-05 14:25:10,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,639 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-05 14:25:10,642 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 [2021-06-05 14:25:10,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:10,672 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 7 treesize of output 5 [2021-06-05 14:25:10,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:10,698 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1461 vanished before elimination [2021-06-05 14:25:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:10,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:10,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:10,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:10,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:10,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:10,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1463 vanished before elimination [2021-06-05 14:25:10,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:10,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:25:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:10,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883146160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:10,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:10,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:10,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11320980] [2021-06-05 14:25:10,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:10,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:10,800 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) [2021-06-05 14:25:11,149 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 14:25:11,383 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 14:25:11,563 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 14:25:11,819 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2021-06-05 14:25:12,050 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-05 14:25:12,258 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 14:25:12,572 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-05 14:25:12,840 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 14:25:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:13,231 INFO L93 Difference]: Finished difference Result 647 states and 1923 transitions. [2021-06-05 14:25:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:25:13,231 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 [2021-06-05 14:25:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:13,232 INFO L225 Difference]: With dead ends: 647 [2021-06-05 14:25:13,232 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:25:13,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2448.1ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:25:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:25:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 381. [2021-06-05 14:25:13,236 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) [2021-06-05 14:25:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1220 transitions. [2021-06-05 14:25:13,237 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1220 transitions. Word has length 18 [2021-06-05 14:25:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:13,237 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1220 transitions. [2021-06-05 14:25:13,237 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) [2021-06-05 14:25:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1220 transitions. [2021-06-05 14:25:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:13,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:13,238 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:13,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5624 [2021-06-05 14:25:13,438 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1275381276, now seen corresponding path program 181 times [2021-06-05 14:25:13,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:13,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691668408] [2021-06-05 14:25:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691668408] [2021-06-05 14:25:13,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691668408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417514862] [2021-06-05 14:25:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:25:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:13,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:13,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,687 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 25 treesize of output 19 [2021-06-05 14:25:13,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,690 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 16 treesize of output 12 [2021-06-05 14:25:13,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:13,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,698 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 25 treesize of output 19 [2021-06-05 14:25:13,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,701 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 [2021-06-05 14:25:13,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:13,704 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 24 treesize of output 18 [2021-06-05 14:25:13,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:13,774 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:25:13,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:13,775 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:25:14,019 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1468], 1=[array_0, v_prenex_1467]} [2021-06-05 14:25:14,021 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 25 treesize of output 19 [2021-06-05 14:25:14,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:14,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,056 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:25:14,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:14,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:14,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:14,074 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:14,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,077 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 21 treesize of output 7 [2021-06-05 14:25:14,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:14,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:14,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:14,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:14,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:14,102 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417514862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:14,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:14,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:14,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675637678] [2021-06-05 14:25:14,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:14,123 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) [2021-06-05 14:25:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:14,807 INFO L93 Difference]: Finished difference Result 616 states and 1849 transitions. [2021-06-05 14:25:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:14,807 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 [2021-06-05 14:25:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:14,808 INFO L225 Difference]: With dead ends: 616 [2021-06-05 14:25:14,808 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:25:14,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:25:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:25:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 386. [2021-06-05 14:25:14,813 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) [2021-06-05 14:25:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-06-05 14:25:14,813 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-06-05 14:25:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:14,813 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-06-05 14:25:14,813 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) [2021-06-05 14:25:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-06-05 14:25:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:14,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:14,814 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:15,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5641 [2021-06-05 14:25:15,015 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2131877222, now seen corresponding path program 182 times [2021-06-05 14:25:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:15,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063300137] [2021-06-05 14:25:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063300137] [2021-06-05 14:25:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063300137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43369745] [2021-06-05 14:25:15,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:25:15,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:15,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:15,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,265 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 25 treesize of output 19 [2021-06-05 14:25:15,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,269 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 16 treesize of output 12 [2021-06-05 14:25:15,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,272 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 26 treesize of output 20 [2021-06-05 14:25:15,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:15,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,280 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 [2021-06-05 14:25:15,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,283 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 24 treesize of output 18 [2021-06-05 14:25:15,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,347 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:25:15,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:15,348 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:25:15,603 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1473, array_4], 1=[array_0, v_prenex_1472]} [2021-06-05 14:25:15,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:15,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:15,609 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 [2021-06-05 14:25:15,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,650 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:25:15,653 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 7 treesize of output 5 [2021-06-05 14:25:15,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:15,669 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,672 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 21 treesize of output 7 [2021-06-05 14:25:15,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:15,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:15,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:15,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:15,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:15,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:15,696 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43369745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:15,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:15,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863280687] [2021-06-05 14:25:15,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:15,719 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) [2021-06-05 14:25:16,223 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:25:16,424 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-06-05 14:25:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:16,565 INFO L93 Difference]: Finished difference Result 612 states and 1850 transitions. [2021-06-05 14:25:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:16,565 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 [2021-06-05 14:25:16,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:16,566 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:25:16,566 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:25:16,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:25:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:25:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 389. [2021-06-05 14:25:16,570 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) [2021-06-05 14:25:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1252 transitions. [2021-06-05 14:25:16,571 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1252 transitions. Word has length 18 [2021-06-05 14:25:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:16,571 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1252 transitions. [2021-06-05 14:25:16,571 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) [2021-06-05 14:25:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1252 transitions. [2021-06-05 14:25:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:16,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:16,572 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:16,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:16,772 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:16,772 INFO L82 PathProgramCache]: Analyzing trace with hash 191888476, now seen corresponding path program 183 times [2021-06-05 14:25:16,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:16,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480628842] [2021-06-05 14:25:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:16,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480628842] [2021-06-05 14:25:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480628842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:16,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946898382] [2021-06-05 14:25:16,914 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 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 [2021-06-05 14:25:16,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:25:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:16,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:17,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,009 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 [2021-06-05 14:25:17,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,014 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 16 treesize of output 12 [2021-06-05 14:25:17,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,018 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 18 treesize of output 14 [2021-06-05 14:25:17,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,021 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 17 treesize of output 13 [2021-06-05 14:25:17,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,053 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:25:17,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:17,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:25:17,217 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-05 14:25:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:17,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:17,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,233 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 [2021-06-05 14:25:17,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:17,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:17,314 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:25:17,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,318 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 9 treesize of output 3 [2021-06-05 14:25:17,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,337 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 [2021-06-05 14:25:17,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:17,341 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 [2021-06-05 14:25:17,342 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:17,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:17,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:17,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:17,383 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-05 14:25:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946898382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:17,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:17,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115127714] [2021-06-05 14:25:17,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:17,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:17,464 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) [2021-06-05 14:25:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:18,240 INFO L93 Difference]: Finished difference Result 622 states and 1886 transitions. [2021-06-05 14:25:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:18,240 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 [2021-06-05 14:25:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:18,241 INFO L225 Difference]: With dead ends: 622 [2021-06-05 14:25:18,241 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 14:25:18,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:25:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 14:25:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 383. [2021-06-05 14:25:18,245 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) [2021-06-05 14:25:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1224 transitions. [2021-06-05 14:25:18,246 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1224 transitions. Word has length 18 [2021-06-05 14:25:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:18,246 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1224 transitions. [2021-06-05 14:25:18,246 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) [2021-06-05 14:25:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1224 transitions. [2021-06-05 14:25:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:18,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:18,247 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:18,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5676,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:18,447 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2058487706, now seen corresponding path program 184 times [2021-06-05 14:25:18,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:18,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001460371] [2021-06-05 14:25:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001460371] [2021-06-05 14:25:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001460371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590444896] [2021-06-05 14:25:18,697 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 [2021-06-05 14:25:18,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:18,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:18,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,784 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 25 treesize of output 19 [2021-06-05 14:25:18,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:18,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,792 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 26 treesize of output 20 [2021-06-05 14:25:18,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,795 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 [2021-06-05 14:25:18,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,799 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 [2021-06-05 14:25:18,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:18,802 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 24 treesize of output 18 [2021-06-05 14:25:18,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:18,864 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:25:18,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:18,865 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:25:19,092 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1479], 1=[array_0, v_prenex_1478]} [2021-06-05 14:25:19,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:19,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:19,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,131 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:25:19,133 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 [2021-06-05 14:25:19,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:19,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,149 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:19,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:19,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:19,155 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 [2021-06-05 14:25:19,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:19,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:19,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:19,177 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590444896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:19,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:19,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485234145] [2021-06-05 14:25:19,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:19,200 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) [2021-06-05 14:25:19,644 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 14:25:19,925 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-06-05 14:25:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:20,074 INFO L93 Difference]: Finished difference Result 565 states and 1725 transitions. [2021-06-05 14:25:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:20,074 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 [2021-06-05 14:25:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:20,075 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:25:20,075 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:25:20,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:25:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:25:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-06-05 14:25:20,079 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) [2021-06-05 14:25:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1226 transitions. [2021-06-05 14:25:20,079 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1226 transitions. Word has length 18 [2021-06-05 14:25:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:20,079 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1226 transitions. [2021-06-05 14:25:20,079 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) [2021-06-05 14:25:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1226 transitions. [2021-06-05 14:25:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:20,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:20,080 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5691 [2021-06-05 14:25:20,280 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2131860186, now seen corresponding path program 185 times [2021-06-05 14:25:20,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:20,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451997443] [2021-06-05 14:25:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:20,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451997443] [2021-06-05 14:25:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451997443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054509470] [2021-06-05 14:25:20,444 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 [2021-06-05 14:25:20,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:25:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:20,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,536 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 15 treesize of output 11 [2021-06-05 14:25:20,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,539 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 16 treesize of output 12 [2021-06-05 14:25:20,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,542 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 [2021-06-05 14:25:20,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,545 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 17 treesize of output 13 [2021-06-05 14:25:20,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,575 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:25:20,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:20,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:25:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,648 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 [2021-06-05 14:25:20,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,652 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 [2021-06-05 14:25:20,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:20,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:20,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,663 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 18 treesize of output 14 [2021-06-05 14:25:20,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,666 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 27 treesize of output 21 [2021-06-05 14:25:20,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:20,725 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-05 14:25:20,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:20,728 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 21 treesize of output 7 [2021-06-05 14:25:20,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:20,731 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:20,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:20,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:20,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:20,770 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:25:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:20,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054509470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:20,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:20,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:20,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568043077] [2021-06-05 14:25:20,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:20,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:20,871 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) [2021-06-05 14:25:21,699 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 14:25:21,864 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 14:25:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:22,082 INFO L93 Difference]: Finished difference Result 604 states and 1814 transitions. [2021-06-05 14:25:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:25:22,082 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 [2021-06-05 14:25:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:22,083 INFO L225 Difference]: With dead ends: 604 [2021-06-05 14:25:22,083 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 14:25:22,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1131.8ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:25:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 14:25:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 383. [2021-06-05 14:25:22,087 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) [2021-06-05 14:25:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1227 transitions. [2021-06-05 14:25:22,088 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1227 transitions. Word has length 18 [2021-06-05 14:25:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:22,088 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1227 transitions. [2021-06-05 14:25:22,088 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) [2021-06-05 14:25:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1227 transitions. [2021-06-05 14:25:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:22,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:22,089 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:22,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5709,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:22,289 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1560198562, now seen corresponding path program 186 times [2021-06-05 14:25:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833201508] [2021-06-05 14:25:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:22,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833201508] [2021-06-05 14:25:22,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833201508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:22,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739326607] [2021-06-05 14:25:22,439 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 [2021-06-05 14:25:22,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:25:22,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:22,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:22,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,545 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 34 treesize of output 26 [2021-06-05 14:25:22,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,549 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 [2021-06-05 14:25:22,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:22,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,558 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 24 treesize of output 18 [2021-06-05 14:25:22,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,562 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 [2021-06-05 14:25:22,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:25:22,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:22,566 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 [2021-06-05 14:25:22,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:22,676 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:25:22,676 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.8 percent of original size [2021-06-05 14:25:22,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:22,678 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-05 14:25:23,238 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-05 14:25:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,243 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 [2021-06-05 14:25:23,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,248 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 [2021-06-05 14:25:23,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:23,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,259 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 26 treesize of output 20 [2021-06-05 14:25:23,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:25:23,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:23,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:23,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,282 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 26 treesize of output 20 [2021-06-05 14:25:23,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,288 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 [2021-06-05 14:25:23,289 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,294 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 [2021-06-05 14:25:23,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,300 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 28 treesize of output 22 [2021-06-05 14:25:23,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,306 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 [2021-06-05 14:25:23,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:23,314 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,319 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 27 treesize of output 21 [2021-06-05 14:25:23,319 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,324 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 25 treesize of output 19 [2021-06-05 14:25:23,325 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,479 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 14:25:23,480 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:25:23,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,484 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 20 treesize of output 9 [2021-06-05 14:25:23,485 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:23,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:25:23,489 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:23,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:23,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:25:23,547 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:25:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739326607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:23,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:23,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:23,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763459734] [2021-06-05 14:25:23,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:23,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:23,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:23,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:23,628 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) [2021-06-05 14:25:23,977 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 14:25:24,165 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-06-05 14:25:24,462 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 104 [2021-06-05 14:25:24,707 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-05 14:25:24,929 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-06-05 14:25:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:24,970 INFO L93 Difference]: Finished difference Result 570 states and 1742 transitions. [2021-06-05 14:25:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:24,970 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 [2021-06-05 14:25:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:24,971 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:25:24,971 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 14:25:24,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1669.5ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 14:25:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 383. [2021-06-05 14:25:24,975 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) [2021-06-05 14:25:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-06-05 14:25:24,976 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-06-05 14:25:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:24,976 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-06-05 14:25:24,976 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) [2021-06-05 14:25:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-06-05 14:25:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:24,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:24,977 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:25,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5722,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:25,177 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1377475410, now seen corresponding path program 187 times [2021-06-05 14:25:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:25,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794701857] [2021-06-05 14:25:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:25,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794701857] [2021-06-05 14:25:25,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794701857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:25,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764603529] [2021-06-05 14:25:25,392 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 [2021-06-05 14:25:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:25,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,479 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 25 treesize of output 19 [2021-06-05 14:25:25,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,483 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 16 treesize of output 12 [2021-06-05 14:25:25,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:25,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:25,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,494 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 [2021-06-05 14:25:25,495 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,497 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 18 [2021-06-05 14:25:25,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,561 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:25:25,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:25,562 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:25:25,836 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1499], 1=[array_0, v_prenex_1498]} [2021-06-05 14:25:25,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:25,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:25,843 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 25 treesize of output 19 [2021-06-05 14:25:25,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,884 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:25:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:25:25,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,905 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 [2021-06-05 14:25:25,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:25,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:25,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:25,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:25,928 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1498 vanished before elimination [2021-06-05 14:25:25,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:25,929 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764603529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:25,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:25,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:25,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332742820] [2021-06-05 14:25:25,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:25,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:25,951 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) [2021-06-05 14:25:26,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:26,594 INFO L93 Difference]: Finished difference Result 573 states and 1745 transitions. [2021-06-05 14:25:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:26,594 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 [2021-06-05 14:25:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:26,595 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:25:26,595 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 14:25:26,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 809.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 14:25:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 386. [2021-06-05 14:25:26,600 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) [2021-06-05 14:25:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1238 transitions. [2021-06-05 14:25:26,601 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1238 transitions. Word has length 18 [2021-06-05 14:25:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:26,601 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1238 transitions. [2021-06-05 14:25:26,601 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) [2021-06-05 14:25:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1238 transitions. [2021-06-05 14:25:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:26,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:26,601 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:26,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5752,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:26,802 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:26,802 INFO L82 PathProgramCache]: Analyzing trace with hash -562513336, now seen corresponding path program 188 times [2021-06-05 14:25:26,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:26,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595987840] [2021-06-05 14:25:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:26,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595987840] [2021-06-05 14:25:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595987840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919457835] [2021-06-05 14:25:26,972 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 [2021-06-05 14:25:26,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:27,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:27,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,059 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 16 treesize of output 12 [2021-06-05 14:25:27,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,063 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 18 treesize of output 14 [2021-06-05 14:25:27,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,065 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 17 treesize of output 13 [2021-06-05 14:25:27,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,095 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:25:27,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:27,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:25:27,271 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-05 14:25:27,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:27,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:27,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,283 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 [2021-06-05 14:25:27,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,286 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 27 treesize of output 21 [2021-06-05 14:25:27,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:27,365 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:25:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,369 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 [2021-06-05 14:25:27,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,372 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 21 treesize of output 7 [2021-06-05 14:25:27,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:27,383 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 9 treesize of output 3 [2021-06-05 14:25:27,384 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:27,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:27,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:27,429 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-05 14:25:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:27,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919457835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:27,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201467118] [2021-06-05 14:25:27,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:27,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:27,510 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) [2021-06-05 14:25:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:27,969 INFO L93 Difference]: Finished difference Result 579 states and 1769 transitions. [2021-06-05 14:25:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:27,969 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 [2021-06-05 14:25:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:27,970 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:25:27,970 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:25:27,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:25:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 383. [2021-06-05 14:25:27,974 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) [2021-06-05 14:25:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-06-05 14:25:27,974 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-06-05 14:25:27,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:27,974 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-06-05 14:25:27,975 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) [2021-06-05 14:25:27,975 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-06-05 14:25:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:27,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:27,975 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:28,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5769 [2021-06-05 14:25:28,175 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:28,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1618750450, now seen corresponding path program 189 times [2021-06-05 14:25:28,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:28,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609246105] [2021-06-05 14:25:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:28,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:28,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609246105] [2021-06-05 14:25:28,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609246105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:28,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504304661] [2021-06-05 14:25:28,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:25:28,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:25:28,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:28,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:28,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,460 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 34 treesize of output 26 [2021-06-05 14:25:28,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,464 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 [2021-06-05 14:25:28,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,468 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 [2021-06-05 14:25:28,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,472 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 24 treesize of output 18 [2021-06-05 14:25:28,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,476 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 35 treesize of output 27 [2021-06-05 14:25:28,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:25:28,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:28,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,587 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 14:25:28,588 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.8 percent of original size [2021-06-05 14:25:28,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:28,589 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-05 14:25:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,774 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 46 treesize of output 36 [2021-06-05 14:25:28,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,779 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 27 treesize of output 21 [2021-06-05 14:25:28,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,784 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 45 treesize of output 35 [2021-06-05 14:25:28,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:28,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:28,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,797 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 27 treesize of output 21 [2021-06-05 14:25:28,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:28,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:28,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:28,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:28,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,816 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 25 treesize of output 19 [2021-06-05 14:25:28,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,821 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 [2021-06-05 14:25:28,822 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,825 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 26 treesize of output 20 [2021-06-05 14:25:28,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:28,830 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,909 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-06-05 14:25:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:28,912 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 20 treesize of output 9 [2021-06-05 14:25:28,912 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:25:28,915 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:28,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:28,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:28,943 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-06-05 14:25:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:29,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504304661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:29,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:29,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:29,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992487963] [2021-06-05 14:25:29,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:29,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:29,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:29,059 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) [2021-06-05 14:25:29,376 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 14:25:29,568 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-06-05 14:25:29,781 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-06-05 14:25:30,003 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-06-05 14:25:30,228 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 14:25:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:30,260 INFO L93 Difference]: Finished difference Result 570 states and 1737 transitions. [2021-06-05 14:25:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:30,261 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 [2021-06-05 14:25:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:30,262 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:25:30,262 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:25:30,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1361.1ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:25:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-06-05 14:25:30,266 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) [2021-06-05 14:25:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1225 transitions. [2021-06-05 14:25:30,266 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1225 transitions. Word has length 18 [2021-06-05 14:25:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:30,266 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1225 transitions. [2021-06-05 14:25:30,266 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) [2021-06-05 14:25:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1225 transitions. [2021-06-05 14:25:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:30,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:30,267 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:30,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-05 14:25:30,467 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:30,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1865370622, now seen corresponding path program 190 times [2021-06-05 14:25:30,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:30,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037076527] [2021-06-05 14:25:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:30,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:30,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037076527] [2021-06-05 14:25:30,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037076527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:30,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8042794] [2021-06-05 14:25:30,635 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 [2021-06-05 14:25:30,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:30,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,756 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 17 treesize of output 13 [2021-06-05 14:25:30,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:30,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,765 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 25 treesize of output 19 [2021-06-05 14:25:30,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:30,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:30,768 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 [2021-06-05 14:25:30,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:30,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:30,822 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. [2021-06-05 14:25:30,822 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:137, output treesize:125 [2021-06-05 14:25:31,142 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-06-05 14:25:31,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,147 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 18 treesize of output 14 [2021-06-05 14:25:31,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,151 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 [2021-06-05 14:25:31,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:31,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,161 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 26 treesize of output 20 [2021-06-05 14:25:31,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:31,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,171 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 [2021-06-05 14:25:31,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:31,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,181 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 19 treesize of output 15 [2021-06-05 14:25:31,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,186 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 16 treesize of output 12 [2021-06-05 14:25:31,187 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:31,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:31,197 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,200 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 18 treesize of output 14 [2021-06-05 14:25:31,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,351 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 14:25:31,352 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-06-05 14:25:31,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:25:31,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,360 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 9 treesize of output 3 [2021-06-05 14:25:31,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:31,364 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 20 treesize of output 9 [2021-06-05 14:25:31,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:31,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:31,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:25:31,428 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-06-05 14:25:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:31,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8042794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:31,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:31,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864910227] [2021-06-05 14:25:31,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:31,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:31,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:31,520 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) [2021-06-05 14:25:31,800 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 14:25:32,011 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-05 14:25:32,290 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2021-06-05 14:25:32,449 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-06-05 14:25:32,669 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-06-05 14:25:32,846 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 14:25:33,006 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-05 14:25:33,155 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-05 14:25:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:33,268 INFO L93 Difference]: Finished difference Result 586 states and 1775 transitions. [2021-06-05 14:25:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:25:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:33,269 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:25:33,270 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:25:33,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1796.5ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:25:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:25:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 382. [2021-06-05 14:25:33,273 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) [2021-06-05 14:25:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1221 transitions. [2021-06-05 14:25:33,274 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1221 transitions. Word has length 18 [2021-06-05 14:25:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:33,274 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1221 transitions. [2021-06-05 14:25:33,274 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) [2021-06-05 14:25:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1221 transitions. [2021-06-05 14:25:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:33,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:33,275 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:33,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-05 14:25:33,475 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1627349486, now seen corresponding path program 191 times [2021-06-05 14:25:33,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:33,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512810163] [2021-06-05 14:25:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:33,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512810163] [2021-06-05 14:25:33,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512810163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243296029] [2021-06-05 14:25:33,728 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 [2021-06-05 14:25:33,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:33,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,841 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 [2021-06-05 14:25:33,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,845 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 26 treesize of output 20 [2021-06-05 14:25:33,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:33,848 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 25 treesize of output 19 [2021-06-05 14:25:33,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:33,917 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:25:33,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:33,918 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:25:34,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,037 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 [2021-06-05 14:25:34,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,041 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 [2021-06-05 14:25:34,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:34,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,046 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 [2021-06-05 14:25:34,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:34,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,053 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 18 treesize of output 14 [2021-06-05 14:25:34,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:34,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,061 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 [2021-06-05 14:25:34,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,124 INFO L628 ElimStorePlain]: treesize reduction 114, result has 41.5 percent of original size [2021-06-05 14:25:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:34,127 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 [2021-06-05 14:25:34,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:34,130 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:34,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:34,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:34,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:34,162 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-06-05 14:25:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:34,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243296029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:34,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:34,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:34,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400313746] [2021-06-05 14:25:34,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:34,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:34,316 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) [2021-06-05 14:25:34,879 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-05 14:25:35,145 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-06-05 14:25:35,423 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-05 14:25:35,692 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-05 14:25:36,067 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-06-05 14:25:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:36,221 INFO L93 Difference]: Finished difference Result 573 states and 1733 transitions. [2021-06-05 14:25:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:36,222 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 [2021-06-05 14:25:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:36,223 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:25:36,223 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:25:36,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2045.4ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:25:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:25:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 380. [2021-06-05 14:25:36,227 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) [2021-06-05 14:25:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1214 transitions. [2021-06-05 14:25:36,227 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1214 transitions. Word has length 18 [2021-06-05 14:25:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:36,227 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1214 transitions. [2021-06-05 14:25:36,227 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) [2021-06-05 14:25:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1214 transitions. [2021-06-05 14:25:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:36,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:36,228 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:36,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5829,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:36,428 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1710682082, now seen corresponding path program 192 times [2021-06-05 14:25:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:36,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077817124] [2021-06-05 14:25:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:36,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:36,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077817124] [2021-06-05 14:25:36,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077817124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:36,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512231500] [2021-06-05 14:25:36,656 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 [2021-06-05 14:25:36,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:25:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:36,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:36,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,748 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 18 treesize of output 14 [2021-06-05 14:25:36,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:36,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,781 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:25:36,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:36,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:25:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:36,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:36,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:36,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:36,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,871 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 18 treesize of output 14 [2021-06-05 14:25:36,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,875 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 [2021-06-05 14:25:36,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:36,933 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-05 14:25:36,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:36,935 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 [2021-06-05 14:25:36,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:25:36,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:36,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:36,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:36,972 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:25:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512231500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:37,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:37,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:37,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541875054] [2021-06-05 14:25:37,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:37,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:37,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:37,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:37,083 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) [2021-06-05 14:25:37,829 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-05 14:25:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:37,879 INFO L93 Difference]: Finished difference Result 590 states and 1797 transitions. [2021-06-05 14:25:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:37,879 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 [2021-06-05 14:25:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:37,884 INFO L225 Difference]: With dead ends: 590 [2021-06-05 14:25:37,884 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 14:25:37,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 889.9ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:25:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 14:25:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 379. [2021-06-05 14:25:37,888 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) [2021-06-05 14:25:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1211 transitions. [2021-06-05 14:25:37,889 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1211 transitions. Word has length 18 [2021-06-05 14:25:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:37,889 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1211 transitions. [2021-06-05 14:25:37,889 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) [2021-06-05 14:25:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1211 transitions. [2021-06-05 14:25:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:37,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:37,889 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:38,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:38,090 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash 652314188, now seen corresponding path program 193 times [2021-06-05 14:25:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291254248] [2021-06-05 14:25:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:38,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291254248] [2021-06-05 14:25:38,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291254248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064004294] [2021-06-05 14:25:38,254 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 [2021-06-05 14:25:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,507 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 16 treesize of output 12 [2021-06-05 14:25:38,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,512 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 [2021-06-05 14:25:38,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:38,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:38,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,524 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 [2021-06-05 14:25:38,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,528 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 26 treesize of output 20 [2021-06-05 14:25:38,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,642 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:25:38,642 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:25:38,646 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. [2021-06-05 14:25:38,646 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:25:38,814 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1515, array_4], 1=[array_0, v_prenex_1514]} [2021-06-05 14:25:38,817 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 [2021-06-05 14:25:38,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:38,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:38,861 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:25:38,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:25:38,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:38,879 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:38,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,882 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 [2021-06-05 14:25:38,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:38,884 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 [2021-06-05 14:25:38,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:38,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:38,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:38,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:38,912 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:25:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064004294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:38,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:38,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:38,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817238993] [2021-06-05 14:25:38,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:38,937 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) [2021-06-05 14:25:39,630 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:25:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:40,256 INFO L93 Difference]: Finished difference Result 562 states and 1713 transitions. [2021-06-05 14:25:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:40,256 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 [2021-06-05 14:25:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:40,257 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:25:40,257 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:25:40,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1283.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:25:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 387. [2021-06-05 14:25:40,261 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) [2021-06-05 14:25:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1235 transitions. [2021-06-05 14:25:40,262 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1235 transitions. Word has length 18 [2021-06-05 14:25:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:40,262 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1235 transitions. [2021-06-05 14:25:40,262 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) [2021-06-05 14:25:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1235 transitions. [2021-06-05 14:25:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:40,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:40,262 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:40,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5854,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:40,463 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2133552058, now seen corresponding path program 194 times [2021-06-05 14:25:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:40,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706409328] [2021-06-05 14:25:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:40,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706409328] [2021-06-05 14:25:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706409328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141478034] [2021-06-05 14:25:40,738 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 [2021-06-05 14:25:40,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:40,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:40,997 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 16 treesize of output 12 [2021-06-05 14:25:40,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:41,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,006 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 15 treesize of output 11 [2021-06-05 14:25:41,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,010 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 [2021-06-05 14:25:41,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,014 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 16 treesize of output 12 [2021-06-05 14:25:41,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,018 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 15 treesize of output 11 [2021-06-05 14:25:41,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,132 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:25:41,133 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:25:41,137 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. [2021-06-05 14:25:41,137 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:25:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:25:41,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:41,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,340 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-05 14:25:41,340 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:25:41,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:41,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:41,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,375 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 11 treesize of output 3 [2021-06-05 14:25:41,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:41,379 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 21 treesize of output 7 [2021-06-05 14:25:41,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,414 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 7 treesize of output 5 [2021-06-05 14:25:41,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:41,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:41,439 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1524 vanished before elimination [2021-06-05 14:25:41,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:41,440 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:25:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141478034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:41,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:41,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:41,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80346316] [2021-06-05 14:25:41,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:41,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:41,506 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) [2021-06-05 14:25:42,202 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 14:25:42,477 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 14:25:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:42,870 INFO L93 Difference]: Finished difference Result 573 states and 1735 transitions. [2021-06-05 14:25:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:42,871 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 [2021-06-05 14:25:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:42,871 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:25:42,871 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:25:42,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1444.5ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:25:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 388. [2021-06-05 14:25:42,875 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) [2021-06-05 14:25:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1245 transitions. [2021-06-05 14:25:42,876 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1245 transitions. Word has length 18 [2021-06-05 14:25:42,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:42,876 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1245 transitions. [2021-06-05 14:25:42,876 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) [2021-06-05 14:25:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1245 transitions. [2021-06-05 14:25:42,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:42,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:42,877 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:43,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:43,077 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 817394754, now seen corresponding path program 195 times [2021-06-05 14:25:43,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:43,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424069507] [2021-06-05 14:25:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:43,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:43,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424069507] [2021-06-05 14:25:43,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424069507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:43,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881688298] [2021-06-05 14:25:43,239 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 [2021-06-05 14:25:43,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:25:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:43,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,541 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 17 treesize of output 13 [2021-06-05 14:25:43,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:43,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:43,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:43,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:43,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,704 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 [2021-06-05 14:25:43,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,708 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 17 treesize of output 13 [2021-06-05 14:25:43,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:43,780 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. [2021-06-05 14:25:43,781 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:193 [2021-06-05 14:25:43,977 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:25:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,982 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 28 treesize of output 22 [2021-06-05 14:25:43,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,987 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 29 treesize of output 23 [2021-06-05 14:25:43,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,993 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 [2021-06-05 14:25:43,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:43,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:43,998 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 26 treesize of output 20 [2021-06-05 14:25:43,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,003 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 17 treesize of output 13 [2021-06-05 14:25:44,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,008 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 19 treesize of output 15 [2021-06-05 14:25:44,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,013 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 16 treesize of output 12 [2021-06-05 14:25:44,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,018 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 16 treesize of output 12 [2021-06-05 14:25:44,018 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:44,023 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:44,028 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,033 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 18 treesize of output 14 [2021-06-05 14:25:44,034 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:44,038 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,205 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:25:44,206 INFO L628 ElimStorePlain]: treesize reduction 110, result has 62.7 percent of original size [2021-06-05 14:25:44,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:44,211 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,215 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 9 treesize of output 3 [2021-06-05 14:25:44,215 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:44,219 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 [2021-06-05 14:25:44,219 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:44,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:44,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:25:44,287 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:85 [2021-06-05 14:25:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881688298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:44,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:44,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:44,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15252122] [2021-06-05 14:25:44,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:44,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:44,385 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) [2021-06-05 14:25:44,948 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 14:25:45,162 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2021-06-05 14:25:45,301 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 14:25:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:45,447 INFO L93 Difference]: Finished difference Result 557 states and 1718 transitions. [2021-06-05 14:25:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:25:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:45,448 INFO L225 Difference]: With dead ends: 557 [2021-06-05 14:25:45,448 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:25:45,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:25:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:25:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 386. [2021-06-05 14:25:45,452 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) [2021-06-05 14:25:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-06-05 14:25:45,453 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-06-05 14:25:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:45,453 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-06-05 14:25:45,453 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) [2021-06-05 14:25:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-06-05 14:25:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:45,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:45,454 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:45,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5896,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:45,654 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1095578010, now seen corresponding path program 196 times [2021-06-05 14:25:45,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:45,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488968516] [2021-06-05 14:25:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:45,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:45,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488968516] [2021-06-05 14:25:45,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488968516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:45,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157178150] [2021-06-05 14:25:45,775 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 [2021-06-05 14:25:45,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:45,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,930 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 24 treesize of output 18 [2021-06-05 14:25:45,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,934 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 [2021-06-05 14:25:45,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:45,937 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 15 treesize of output 11 [2021-06-05 14:25:45,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:45,994 INFO L628 ElimStorePlain]: treesize reduction 33, result has 68.0 percent of original size [2021-06-05 14:25:45,996 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. [2021-06-05 14:25:45,996 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-06-05 14:25:46,110 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1537, array_4], 1=[array_0, v_prenex_1536]} [2021-06-05 14:25:46,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:46,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,116 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 25 treesize of output 19 [2021-06-05 14:25:46,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,147 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:25:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:46,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:46,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:25:46,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:46,171 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 [2021-06-05 14:25:46,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:46,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:46,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1536 vanished before elimination [2021-06-05 14:25:46,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:46,193 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:46,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157178150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:46,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:46,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326041805] [2021-06-05 14:25:46,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:46,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:46,216 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) [2021-06-05 14:25:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:46,697 INFO L93 Difference]: Finished difference Result 565 states and 1734 transitions. [2021-06-05 14:25:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:25:46,697 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 [2021-06-05 14:25:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:46,698 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:25:46,698 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:25:46,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:25:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:25:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 398. [2021-06-05 14:25:46,702 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) [2021-06-05 14:25:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-06-05 14:25:46,703 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-06-05 14:25:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:46,703 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-06-05 14:25:46,703 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) [2021-06-05 14:25:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-06-05 14:25:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:46,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:46,703 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:46,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5925 [2021-06-05 14:25:46,905 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:46,905 INFO L82 PathProgramCache]: Analyzing trace with hash 385659860, now seen corresponding path program 197 times [2021-06-05 14:25:46,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:46,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924946791] [2021-06-05 14:25:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:47,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:47,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924946791] [2021-06-05 14:25:47,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924946791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:47,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052589104] [2021-06-05 14:25:47,003 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 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 [2021-06-05 14:25:47,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:25:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:47,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:47,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,163 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 15 treesize of output 11 [2021-06-05 14:25:47,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,190 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. [2021-06-05 14:25:47,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:25:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,257 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 15 treesize of output 11 [2021-06-05 14:25:47,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:47,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,306 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.5 percent of original size [2021-06-05 14:25:47,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:47,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:47,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:47,335 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 21 treesize of output 7 [2021-06-05 14:25:47,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,337 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 11 treesize of output 3 [2021-06-05 14:25:47,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:47,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:47,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1540 vanished before elimination [2021-06-05 14:25:47,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:25:47,368 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-05 14:25:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052589104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:47,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:47,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377246759] [2021-06-05 14:25:47,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:47,429 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) [2021-06-05 14:25:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:47,924 INFO L93 Difference]: Finished difference Result 561 states and 1738 transitions. [2021-06-05 14:25:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:47,924 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 [2021-06-05 14:25:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:47,925 INFO L225 Difference]: With dead ends: 561 [2021-06-05 14:25:47,925 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 14:25:47,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 14:25:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 398. [2021-06-05 14:25:47,929 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) [2021-06-05 14:25:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-06-05 14:25:47,930 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-06-05 14:25:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:47,930 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-06-05 14:25:47,930 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) [2021-06-05 14:25:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-06-05 14:25:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:47,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:47,931 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:48,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5941,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:48,152 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2013206684, now seen corresponding path program 198 times [2021-06-05 14:25:48,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:48,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619290757] [2021-06-05 14:25:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:48,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619290757] [2021-06-05 14:25:48,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619290757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162545438] [2021-06-05 14:25:48,313 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 [2021-06-05 14:25:48,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:25:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:48,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,484 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 34 treesize of output 26 [2021-06-05 14:25:48,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,489 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 24 treesize of output 18 [2021-06-05 14:25:48,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,494 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 [2021-06-05 14:25:48,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,498 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 35 treesize of output 27 [2021-06-05 14:25:48,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:25:48,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:48,504 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 25 treesize of output 19 [2021-06-05 14:25:48,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:48,620 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:25:48,621 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.3 percent of original size [2021-06-05 14:25:48,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:48,622 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-05 14:25:48,926 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 14:25:49,069 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-05 14:25:49,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,074 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 27 treesize of output 21 [2021-06-05 14:25:49,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,079 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 26 treesize of output 20 [2021-06-05 14:25:49,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,085 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 27 treesize of output 21 [2021-06-05 14:25:49,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:49,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:49,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,102 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 [2021-06-05 14:25:49,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,107 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 28 treesize of output 22 [2021-06-05 14:25:49,108 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:25:49,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,117 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 16 treesize of output 12 [2021-06-05 14:25:49,118 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,122 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 16 treesize of output 12 [2021-06-05 14:25:49,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,128 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 15 treesize of output 11 [2021-06-05 14:25:49,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,133 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 28 treesize of output 22 [2021-06-05 14:25:49,134 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,139 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 [2021-06-05 14:25:49,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,144 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 [2021-06-05 14:25:49,144 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,296 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 14:25:49,296 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:25:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,301 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 20 treesize of output 9 [2021-06-05 14:25:49,301 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:49,305 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 20 treesize of output 9 [2021-06-05 14:25:49,305 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:49,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:49,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:25:49,362 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:25:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:49,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162545438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:49,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:49,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596471413] [2021-06-05 14:25:49,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:49,449 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) [2021-06-05 14:25:49,903 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:25:50,234 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 120 [2021-06-05 14:25:50,711 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 14:25:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:50,899 INFO L93 Difference]: Finished difference Result 564 states and 1721 transitions. [2021-06-05 14:25:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:50,899 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 [2021-06-05 14:25:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:50,900 INFO L225 Difference]: With dead ends: 564 [2021-06-05 14:25:50,900 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:25:50,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1604.1ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:25:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 400. [2021-06-05 14:25:50,904 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) [2021-06-05 14:25:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1285 transitions. [2021-06-05 14:25:50,905 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1285 transitions. Word has length 18 [2021-06-05 14:25:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:50,905 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1285 transitions. [2021-06-05 14:25:50,905 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) [2021-06-05 14:25:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1285 transitions. [2021-06-05 14:25:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:50,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:50,906 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:51,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5954,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:51,106 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash -584251578, now seen corresponding path program 199 times [2021-06-05 14:25:51,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:51,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294802852] [2021-06-05 14:25:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:51,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:51,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294802852] [2021-06-05 14:25:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294802852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:51,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975736050] [2021-06-05 14:25:51,314 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 [2021-06-05 14:25:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:51,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,465 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 26 treesize of output 20 [2021-06-05 14:25:51,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,469 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 25 treesize of output 19 [2021-06-05 14:25:51,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:51,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,476 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 [2021-06-05 14:25:51,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,558 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-05 14:25:51,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:51,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-05 14:25:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,785 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 17 treesize of output 13 [2021-06-05 14:25:51,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,789 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 15 treesize of output 11 [2021-06-05 14:25:51,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,852 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-06-05 14:25:51,853 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:25:51,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:25:51,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,878 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1553 vanished before elimination [2021-06-05 14:25:51,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,880 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 [2021-06-05 14:25:51,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:51,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:51,909 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 11 treesize of output 3 [2021-06-05 14:25:51,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,924 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 21 treesize of output 7 [2021-06-05 14:25:51,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:51,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:51,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:51,960 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-06-05 14:25:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:52,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975736050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:52,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:52,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592712369] [2021-06-05 14:25:52,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:52,038 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) [2021-06-05 14:25:52,517 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 14:25:52,710 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 14:25:52,971 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:25:53,357 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 14:25:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:53,534 INFO L93 Difference]: Finished difference Result 555 states and 1694 transitions. [2021-06-05 14:25:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:25:53,534 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 [2021-06-05 14:25:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:53,535 INFO L225 Difference]: With dead ends: 555 [2021-06-05 14:25:53,535 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:25:53,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1542.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:25:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:25:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 396. [2021-06-05 14:25:53,539 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) [2021-06-05 14:25:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-06-05 14:25:53,540 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-06-05 14:25:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:53,540 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-06-05 14:25:53,540 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) [2021-06-05 14:25:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-06-05 14:25:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:53,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:53,541 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:53,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5987 [2021-06-05 14:25:53,741 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash 934576270, now seen corresponding path program 200 times [2021-06-05 14:25:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791854939] [2021-06-05 14:25:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:53,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:53,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791854939] [2021-06-05 14:25:53,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791854939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:53,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598927708] [2021-06-05 14:25:53,899 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 [2021-06-05 14:25:53,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:53,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,024 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 [2021-06-05 14:25:54,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,030 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 24 treesize of output 18 [2021-06-05 14:25:54,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,035 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 26 treesize of output 20 [2021-06-05 14:25:54,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:25:54,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,045 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 25 treesize of output 19 [2021-06-05 14:25:54,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,049 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 15 treesize of output 11 [2021-06-05 14:25:54,050 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,135 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-05 14:25:54,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:54,136 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:25:54,369 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1562], 1=[array_0, v_prenex_1561]} [2021-06-05 14:25:54,371 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 [2021-06-05 14:25:54,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:54,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,406 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:25:54,408 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 27 treesize of output 21 [2021-06-05 14:25:54,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:54,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:54,424 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,426 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 11 treesize of output 3 [2021-06-05 14:25:54,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:54,429 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 [2021-06-05 14:25:54,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:54,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:54,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:54,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:54,450 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:25:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:54,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598927708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:54,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:54,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:54,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132291617] [2021-06-05 14:25:54,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:54,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:54,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:54,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:54,472 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) [2021-06-05 14:25:54,801 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 14:25:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:55,093 INFO L93 Difference]: Finished difference Result 543 states and 1672 transitions. [2021-06-05 14:25:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:55,093 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 [2021-06-05 14:25:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:55,094 INFO L225 Difference]: With dead ends: 543 [2021-06-05 14:25:55,094 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 14:25:55,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 14:25:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-06-05 14:25:55,098 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) [2021-06-05 14:25:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1283 transitions. [2021-06-05 14:25:55,099 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1283 transitions. Word has length 18 [2021-06-05 14:25:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:55,099 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1283 transitions. [2021-06-05 14:25:55,099 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) [2021-06-05 14:25:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1283 transitions. [2021-06-05 14:25:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:55,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:55,100 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:55,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6004 [2021-06-05 14:25:55,300 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1005412476, now seen corresponding path program 201 times [2021-06-05 14:25:55,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362557305] [2021-06-05 14:25:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:55,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362557305] [2021-06-05 14:25:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362557305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423033471] [2021-06-05 14:25:55,443 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 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 [2021-06-05 14:25:55,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:25:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:55,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:55,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:55,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,554 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 17 treesize of output 13 [2021-06-05 14:25:55,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,558 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 18 treesize of output 14 [2021-06-05 14:25:55,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:25:55,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:55,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,607 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-05 14:25:55,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:55,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:25:55,758 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:25:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,761 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 27 treesize of output 21 [2021-06-05 14:25:55,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:55,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,767 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 17 treesize of output 13 [2021-06-05 14:25:55,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,772 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 [2021-06-05 14:25:55,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,776 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 [2021-06-05 14:25:55,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,847 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:25:55,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,851 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 9 treesize of output 3 [2021-06-05 14:25:55,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,855 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 [2021-06-05 14:25:55,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:55,858 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 21 treesize of output 7 [2021-06-05 14:25:55,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:55,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:55,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:55,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:25:55,897 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-05 14:25:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:55,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423033471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:55,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:55,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:55,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831211461] [2021-06-05 14:25:55,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:55,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:55,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:55,983 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) [2021-06-05 14:25:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:56,576 INFO L93 Difference]: Finished difference Result 557 states and 1716 transitions. [2021-06-05 14:25:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:25:56,576 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 [2021-06-05 14:25:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:56,577 INFO L225 Difference]: With dead ends: 557 [2021-06-05 14:25:56,577 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 14:25:56,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 14:25:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 397. [2021-06-05 14:25:56,581 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) [2021-06-05 14:25:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1273 transitions. [2021-06-05 14:25:56,582 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1273 transitions. Word has length 18 [2021-06-05 14:25:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:56,582 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1273 transitions. [2021-06-05 14:25:56,582 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) [2021-06-05 14:25:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1273 transitions. [2021-06-05 14:25:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:56,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:56,583 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:56,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6022 [2021-06-05 14:25:56,783 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash 119770116, now seen corresponding path program 202 times [2021-06-05 14:25:56,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:56,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009540029] [2021-06-05 14:25:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:56,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:56,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009540029] [2021-06-05 14:25:56,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009540029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:56,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155043099] [2021-06-05 14:25:56,969 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 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 [2021-06-05 14:25:56,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:25:56,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:25:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:57,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,080 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 [2021-06-05 14:25:57,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,084 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 24 treesize of output 18 [2021-06-05 14:25:57,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,088 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 26 treesize of output 20 [2021-06-05 14:25:57,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,093 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 [2021-06-05 14:25:57,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:57,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,101 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 [2021-06-05 14:25:57,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,185 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-05 14:25:57,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:57,187 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:25:57,326 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1569], 1=[array_0, v_prenex_1568]} [2021-06-05 14:25:57,329 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 25 treesize of output 19 [2021-06-05 14:25:57,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,332 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 15 treesize of output 11 [2021-06-05 14:25:57,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,336 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 15 treesize of output 11 [2021-06-05 14:25:57,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,382 INFO L628 ElimStorePlain]: treesize reduction 69, result has 48.1 percent of original size [2021-06-05 14:25:57,384 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 27 treesize of output 21 [2021-06-05 14:25:57,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:57,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:57,409 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:25:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,411 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 21 treesize of output 7 [2021-06-05 14:25:57,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:57,414 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 [2021-06-05 14:25:57,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:57,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:57,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:57,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:25:57,444 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:154, output treesize:53 [2021-06-05 14:25:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155043099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:57,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:57,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:25:57,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415784640] [2021-06-05 14:25:57,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:25:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:25:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:25:57,514 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) [2021-06-05 14:25:57,947 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 14:25:58,218 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 14:25:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:25:58,374 INFO L93 Difference]: Finished difference Result 534 states and 1648 transitions. [2021-06-05 14:25:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:25:58,374 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 [2021-06-05 14:25:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:25:58,375 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:25:58,375 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:25:58,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:25:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:25:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 396. [2021-06-05 14:25:58,379 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) [2021-06-05 14:25:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-06-05 14:25:58,380 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-06-05 14:25:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:25:58,380 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-06-05 14:25:58,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:25:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-06-05 14:25:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:25:58,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:25:58,380 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:25:58,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6035,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:25:58,581 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:25:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:25:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2110473790, now seen corresponding path program 203 times [2021-06-05 14:25:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:25:58,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890247495] [2021-06-05 14:25:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:25:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:25:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:58,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:25:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890247495] [2021-06-05 14:25:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890247495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450280362] [2021-06-05 14:25:58,765 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 [2021-06-05 14:25:58,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:25:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:25:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:25:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:25:58,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:58,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:58,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,930 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 17 treesize of output 13 [2021-06-05 14:25:58,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,934 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 [2021-06-05 14:25:58,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:58,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:25:58,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:25:58,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:58,991 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. [2021-06-05 14:25:58,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:149, output treesize:137 [2021-06-05 14:25:59,118 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:25:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:25:59,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,127 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 19 treesize of output 15 [2021-06-05 14:25:59,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,131 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 28 treesize of output 22 [2021-06-05 14:25:59,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:25:59,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,140 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 [2021-06-05 14:25:59,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,145 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 18 treesize of output 14 [2021-06-05 14:25:59,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,150 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 [2021-06-05 14:25:59,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,154 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 18 treesize of output 14 [2021-06-05 14:25:59,155 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,158 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 17 treesize of output 13 [2021-06-05 14:25:59,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,162 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 16 treesize of output 12 [2021-06-05 14:25:59,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,319 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 14:25:59,320 INFO L628 ElimStorePlain]: treesize reduction 93, result has 63.7 percent of original size [2021-06-05 14:25:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,323 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 20 treesize of output 9 [2021-06-05 14:25:59,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,328 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 [2021-06-05 14:25:59,328 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:25:59,331 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 9 treesize of output 3 [2021-06-05 14:25:59,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:25:59,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:25:59,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:25:59,395 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:385, output treesize:90 [2021-06-05 14:25:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:25:59,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450280362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:25:59,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:25:59,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:25:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185960529] [2021-06-05 14:25:59,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:25:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:25:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:25:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:25:59,531 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) [2021-06-05 14:26:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:00,081 INFO L93 Difference]: Finished difference Result 550 states and 1696 transitions. [2021-06-05 14:26:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:00,081 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 [2021-06-05 14:26:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:00,082 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:26:00,082 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:26:00,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:26:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:26:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 394. [2021-06-05 14:26:00,085 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) [2021-06-05 14:26:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1266 transitions. [2021-06-05 14:26:00,086 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1266 transitions. Word has length 18 [2021-06-05 14:26:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:00,086 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1266 transitions. [2021-06-05 14:26:00,086 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) [2021-06-05 14:26:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1266 transitions. [2021-06-05 14:26:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:00,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:00,087 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:00,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6048 [2021-06-05 14:26:00,309 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:00,309 INFO L82 PathProgramCache]: Analyzing trace with hash -703930412, now seen corresponding path program 204 times [2021-06-05 14:26:00,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:00,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669509947] [2021-06-05 14:26:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:00,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:00,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669509947] [2021-06-05 14:26:00,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669509947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:00,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418440654] [2021-06-05 14:26:00,553 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 [2021-06-05 14:26:00,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:26:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,674 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 25 treesize of output 19 [2021-06-05 14:26:00,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,678 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 24 treesize of output 18 [2021-06-05 14:26:00,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:00,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,686 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 16 treesize of output 12 [2021-06-05 14:26:00,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,690 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 [2021-06-05 14:26:00,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:00,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:00,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,780 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-05 14:26:00,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:00,782 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:00,861 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]} [2021-06-05 14:26:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:26:00,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:00,953 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-05 14:26:00,953 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:00,956 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 18 treesize of output 14 [2021-06-05 14:26:00,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:01,006 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-06-05 14:26:01,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1573 vanished before elimination [2021-06-05 14:26:01,009 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 27 treesize of output 21 [2021-06-05 14:26:01,010 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:01,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:01,041 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 21 treesize of output 7 [2021-06-05 14:26:01,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:01,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:26:01,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:01,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:01,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:01,079 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 7 treesize of output 5 [2021-06-05 14:26:01,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:01,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:01,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1577 vanished before elimination [2021-06-05 14:26:01,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:01,105 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-05 14:26:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:01,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418440654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:01,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:01,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:01,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696768885] [2021-06-05 14:26:01,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:01,215 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) [2021-06-05 14:26:01,715 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 14:26:01,916 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 14:26:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:02,204 INFO L93 Difference]: Finished difference Result 609 states and 1849 transitions. [2021-06-05 14:26:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:02,205 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 [2021-06-05 14:26:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:02,205 INFO L225 Difference]: With dead ends: 609 [2021-06-05 14:26:02,205 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 14:26:02,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1001.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:26:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 14:26:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 395. [2021-06-05 14:26:02,210 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) [2021-06-05 14:26:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1269 transitions. [2021-06-05 14:26:02,211 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1269 transitions. Word has length 18 [2021-06-05 14:26:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:02,211 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1269 transitions. [2021-06-05 14:26:02,211 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) [2021-06-05 14:26:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1269 transitions. [2021-06-05 14:26:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:02,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:02,212 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:02,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6078 [2021-06-05 14:26:02,421 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 657625694, now seen corresponding path program 205 times [2021-06-05 14:26:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547095821] [2021-06-05 14:26:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:02,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:02,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547095821] [2021-06-05 14:26:02,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547095821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:02,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669010503] [2021-06-05 14:26:02,641 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 [2021-06-05 14:26:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:02,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:02,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,753 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 [2021-06-05 14:26:02,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,757 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 24 treesize of output 18 [2021-06-05 14:26:02,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,761 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 26 treesize of output 20 [2021-06-05 14:26:02,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,765 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 16 treesize of output 12 [2021-06-05 14:26:02,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:02,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:02,773 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 15 treesize of output 11 [2021-06-05 14:26:02,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:02,864 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-05 14:26:02,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:02,865 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:02,942 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]} [2021-06-05 14:26:02,946 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 18 treesize of output 14 [2021-06-05 14:26:02,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,032 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-05 14:26:03,033 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:03,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:03,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,086 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-06-05 14:26:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:26:03,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:03,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:03,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1582 vanished before elimination [2021-06-05 14:26:03,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1584 vanished before elimination [2021-06-05 14:26:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:26:03,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:03,151 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 21 treesize of output 7 [2021-06-05 14:26:03,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:03,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:03,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:03,183 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-05 14:26:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669010503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:03,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:03,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:03,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596150025] [2021-06-05 14:26:03,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:03,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:03,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:03,294 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) [2021-06-05 14:26:03,650 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 14:26:03,966 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 14:26:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:04,025 INFO L93 Difference]: Finished difference Result 536 states and 1653 transitions. [2021-06-05 14:26:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:04,025 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 [2021-06-05 14:26:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:04,026 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:26:04,026 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:26:04,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 858.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:26:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:26:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-06-05 14:26:04,029 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) [2021-06-05 14:26:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1255 transitions. [2021-06-05 14:26:04,030 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1255 transitions. Word has length 18 [2021-06-05 14:26:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:04,030 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1255 transitions. [2021-06-05 14:26:04,030 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) [2021-06-05 14:26:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1255 transitions. [2021-06-05 14:26:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:04,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:04,031 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:04,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6095,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:04,231 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash -187420450, now seen corresponding path program 206 times [2021-06-05 14:26:04,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:04,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454950555] [2021-06-05 14:26:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:04,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454950555] [2021-06-05 14:26:04,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454950555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664884759] [2021-06-05 14:26:04,399 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 [2021-06-05 14:26:04,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:04,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:04,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,543 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 27 treesize of output 21 [2021-06-05 14:26:04,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:04,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,547 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 [2021-06-05 14:26:04,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:04,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:04,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:04,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:04,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:26:04,944 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:26:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,948 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 16 treesize of output 12 [2021-06-05 14:26:04,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,953 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 15 treesize of output 11 [2021-06-05 14:26:04,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,958 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 26 treesize of output 20 [2021-06-05 14:26:04,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,963 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 18 treesize of output 14 [2021-06-05 14:26:04,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,967 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 29 treesize of output 23 [2021-06-05 14:26:04,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,973 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 19 treesize of output 15 [2021-06-05 14:26:04,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,977 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 17 treesize of output 13 [2021-06-05 14:26:04,978 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:04,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,987 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 [2021-06-05 14:26:04,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,992 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 20 treesize of output 16 [2021-06-05 14:26:04,992 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:04,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:04,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:04,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,001 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 [2021-06-05 14:26:05,002 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,154 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:26:05,154 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-06-05 14:26:05,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,158 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 [2021-06-05 14:26:05,159 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:05,163 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:05,167 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 9 treesize of output 3 [2021-06-05 14:26:05,167 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:05,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:05,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:26:05,231 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-06-05 14:26:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664884759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:05,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:05,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042960795] [2021-06-05 14:26:05,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:05,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:05,335 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) [2021-06-05 14:26:05,823 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:26:06,054 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-06-05 14:26:06,296 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 14:26:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:06,711 INFO L93 Difference]: Finished difference Result 579 states and 1760 transitions. [2021-06-05 14:26:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:06,711 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 [2021-06-05 14:26:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:06,712 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:26:06,712 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:26:06,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1478.2ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:26:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:26:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 401. [2021-06-05 14:26:06,716 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) [2021-06-05 14:26:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1285 transitions. [2021-06-05 14:26:06,717 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1285 transitions. Word has length 18 [2021-06-05 14:26:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:06,717 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1285 transitions. [2021-06-05 14:26:06,717 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) [2021-06-05 14:26:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1285 transitions. [2021-06-05 14:26:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:06,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:06,718 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:06,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6112 [2021-06-05 14:26:06,923 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:06,923 INFO L82 PathProgramCache]: Analyzing trace with hash -932373022, now seen corresponding path program 207 times [2021-06-05 14:26:06,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:06,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747168710] [2021-06-05 14:26:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747168710] [2021-06-05 14:26:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747168710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222503953] [2021-06-05 14:26:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:26:07,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:26:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:07,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,266 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 24 treesize of output 18 [2021-06-05 14:26:07,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:07,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:07,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,286 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 26 treesize of output 20 [2021-06-05 14:26:07,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:07,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:07,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,383 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-05 14:26:07,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:07,384 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:07,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,640 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 15 treesize of output 11 [2021-06-05 14:26:07,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:07,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,704 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-06-05 14:26:07,704 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:07,706 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 27 treesize of output 21 [2021-06-05 14:26:07,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:07,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,738 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 10 treesize of output 5 [2021-06-05 14:26:07,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:07,742 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 20 treesize of output 9 [2021-06-05 14:26:07,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,777 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 7 treesize of output 5 [2021-06-05 14:26:07,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:07,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:07,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1601 vanished before elimination [2021-06-05 14:26:07,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:07,803 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:26:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:07,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222503953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:07,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:07,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564262068] [2021-06-05 14:26:07,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:07,888 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) [2021-06-05 14:26:08,341 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-05 14:26:08,616 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2021-06-05 14:26:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:09,196 INFO L93 Difference]: Finished difference Result 615 states and 1856 transitions. [2021-06-05 14:26:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:09,196 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 [2021-06-05 14:26:09,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:09,197 INFO L225 Difference]: With dead ends: 615 [2021-06-05 14:26:09,197 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:26:09,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1397.9ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:26:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-06-05 14:26:09,202 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) [2021-06-05 14:26:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-06-05 14:26:09,202 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-06-05 14:26:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-06-05 14:26:09,202 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) [2021-06-05 14:26:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-06-05 14:26:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:09,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:09,203 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:09,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6130 [2021-06-05 14:26:09,403 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1141669252, now seen corresponding path program 208 times [2021-06-05 14:26:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:09,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975843652] [2021-06-05 14:26:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:09,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:09,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975843652] [2021-06-05 14:26:09,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975843652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:09,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802426872] [2021-06-05 14:26:09,526 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 [2021-06-05 14:26:09,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:09,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:09,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,649 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 25 treesize of output 19 [2021-06-05 14:26:09,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,652 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 26 treesize of output 20 [2021-06-05 14:26:09,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,656 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 [2021-06-05 14:26:09,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,698 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-05 14:26:09,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:09,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-05 14:26:09,845 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:26:09,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,849 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 [2021-06-05 14:26:09,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,853 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 15 treesize of output 11 [2021-06-05 14:26:09,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,857 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 34 treesize of output 26 [2021-06-05 14:26:09,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:09,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:09,865 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,868 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 35 treesize of output 27 [2021-06-05 14:26:09,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:09,938 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-06-05 14:26:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:09,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:26:09,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:09,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:09,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:09,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:09,974 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:26:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:10,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802426872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:10,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:10,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:10,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063782345] [2021-06-05 14:26:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:10,033 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) [2021-06-05 14:26:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:11,017 INFO L93 Difference]: Finished difference Result 660 states and 2026 transitions. [2021-06-05 14:26:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:26:11,018 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 [2021-06-05 14:26:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:11,019 INFO L225 Difference]: With dead ends: 660 [2021-06-05 14:26:11,019 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 14:26:11,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:26:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 14:26:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 403. [2021-06-05 14:26:11,023 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) [2021-06-05 14:26:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-06-05 14:26:11,024 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-06-05 14:26:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:11,024 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-06-05 14:26:11,024 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) [2021-06-05 14:26:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-06-05 14:26:11,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:11,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:11,025 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:11,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6153 [2021-06-05 14:26:11,225 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:11,225 INFO L82 PathProgramCache]: Analyzing trace with hash -922333774, now seen corresponding path program 209 times [2021-06-05 14:26:11,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:11,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264315757] [2021-06-05 14:26:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:11,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:11,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264315757] [2021-06-05 14:26:11,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264315757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:11,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909326515] [2021-06-05 14:26:11,417 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 [2021-06-05 14:26:11,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:11,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:11,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,558 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 27 treesize of output 21 [2021-06-05 14:26:11,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,562 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 17 treesize of output 13 [2021-06-05 14:26:11,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,566 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 [2021-06-05 14:26:11,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,569 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 [2021-06-05 14:26:11,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:11,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:26:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,686 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 18 treesize of output 14 [2021-06-05 14:26:11,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,691 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 29 treesize of output 23 [2021-06-05 14:26:11,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,695 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 19 treesize of output 15 [2021-06-05 14:26:11,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,700 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 17 treesize of output 13 [2021-06-05 14:26:11,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:11,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,707 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 28 treesize of output 22 [2021-06-05 14:26:11,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:11,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,714 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 [2021-06-05 14:26:11,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:11,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,721 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 [2021-06-05 14:26:11,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,796 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-05 14:26:11,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:11,799 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 [2021-06-05 14:26:11,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:11,802 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:11,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:11,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:11,830 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-05 14:26:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:11,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909326515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:11,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:11,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:11,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66057503] [2021-06-05 14:26:11,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:11,988 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) [2021-06-05 14:26:12,440 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:26:12,743 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:26:12,894 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 14:26:13,143 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 14:26:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:13,289 INFO L93 Difference]: Finished difference Result 559 states and 1714 transitions. [2021-06-05 14:26:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:13,290 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 [2021-06-05 14:26:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:13,291 INFO L225 Difference]: With dead ends: 559 [2021-06-05 14:26:13,291 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:26:13,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1396.0ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:26:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:26:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 402. [2021-06-05 14:26:13,294 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) [2021-06-05 14:26:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1298 transitions. [2021-06-05 14:26:13,295 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1298 transitions. Word has length 18 [2021-06-05 14:26:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:13,295 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1298 transitions. [2021-06-05 14:26:13,295 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) [2021-06-05 14:26:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1298 transitions. [2021-06-05 14:26:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:13,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:13,296 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:13,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6166 [2021-06-05 14:26:13,501 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1484252764, now seen corresponding path program 210 times [2021-06-05 14:26:13,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:13,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405673616] [2021-06-05 14:26:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:13,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:13,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405673616] [2021-06-05 14:26:13,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405673616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:13,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987035301] [2021-06-05 14:26:13,682 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 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 [2021-06-05 14:26:13,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:26:13,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:13,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:13,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,793 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 16 treesize of output 12 [2021-06-05 14:26:13,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,797 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 25 treesize of output 19 [2021-06-05 14:26:13,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:13,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,804 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 [2021-06-05 14:26:13,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,847 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-05 14:26:13,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:13,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-05 14:26:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:13,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,901 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 15 treesize of output 11 [2021-06-05 14:26:13,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:26:13,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,909 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 34 treesize of output 26 [2021-06-05 14:26:13,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:13,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:13,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:13,922 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:26:13,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:13,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:13,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,000 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-05 14:26:14,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:14,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:14,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,006 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 [2021-06-05 14:26:14,006 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:14,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:14,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:14,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:14,048 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-05 14:26:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:14,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987035301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:14,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:14,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791691757] [2021-06-05 14:26:14,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:14,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:14,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:14,154 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) [2021-06-05 14:26:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:14,582 INFO L93 Difference]: Finished difference Result 559 states and 1724 transitions. [2021-06-05 14:26:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:14,582 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 [2021-06-05 14:26:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:14,583 INFO L225 Difference]: With dead ends: 559 [2021-06-05 14:26:14,583 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:26:14,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:26:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:26:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 403. [2021-06-05 14:26:14,587 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) [2021-06-05 14:26:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1301 transitions. [2021-06-05 14:26:14,588 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1301 transitions. Word has length 18 [2021-06-05 14:26:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:14,588 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1301 transitions. [2021-06-05 14:26:14,588 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) [2021-06-05 14:26:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1301 transitions. [2021-06-05 14:26:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:14,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:14,588 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:14,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6180,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:14,789 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1449158426, now seen corresponding path program 211 times [2021-06-05 14:26:14,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:14,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602624196] [2021-06-05 14:26:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:14,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602624196] [2021-06-05 14:26:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602624196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:14,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991236290] [2021-06-05 14:26:14,972 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 [2021-06-05 14:26:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:15,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,110 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 16 treesize of output 12 [2021-06-05 14:26:15,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:15,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,117 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 26 treesize of output 20 [2021-06-05 14:26:15,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:15,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,164 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-05 14:26:15,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:15,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-05 14:26:15,226 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 7 treesize of output 5 [2021-06-05 14:26:15,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,230 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 [2021-06-05 14:26:15,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,234 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 18 treesize of output 14 [2021-06-05 14:26:15,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,238 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 34 treesize of output 26 [2021-06-05 14:26:15,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,243 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 [2021-06-05 14:26:15,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,247 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 [2021-06-05 14:26:15,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,251 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:15,251 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,255 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 35 treesize of output 27 [2021-06-05 14:26:15,256 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:15,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:15,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,330 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-05 14:26:15,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:15,333 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 21 treesize of output 7 [2021-06-05 14:26:15,333 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,335 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 21 treesize of output 7 [2021-06-05 14:26:15,336 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:15,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:15,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:15,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:15,368 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-05 14:26:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:15,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991236290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:15,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:15,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:15,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469499962] [2021-06-05 14:26:15,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:15,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:15,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:15,478 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) [2021-06-05 14:26:15,957 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 14:26:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:16,014 INFO L93 Difference]: Finished difference Result 542 states and 1681 transitions. [2021-06-05 14:26:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:16,014 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 [2021-06-05 14:26:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:16,015 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:26:16,015 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:26:16,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:26:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:26:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 401. [2021-06-05 14:26:16,019 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) [2021-06-05 14:26:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1291 transitions. [2021-06-05 14:26:16,020 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1291 transitions. Word has length 18 [2021-06-05 14:26:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:16,020 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1291 transitions. [2021-06-05 14:26:16,020 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) [2021-06-05 14:26:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1291 transitions. [2021-06-05 14:26:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:16,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:16,020 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:16,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6193 [2021-06-05 14:26:16,221 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1050481716, now seen corresponding path program 212 times [2021-06-05 14:26:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:16,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600992621] [2021-06-05 14:26:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:16,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600992621] [2021-06-05 14:26:16,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600992621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361999864] [2021-06-05 14:26:16,418 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 [2021-06-05 14:26:16,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:16,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,569 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 15 treesize of output 11 [2021-06-05 14:26:16,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:26:16,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,577 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 17 treesize of output 13 [2021-06-05 14:26:16,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:16,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:16,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:16,620 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:26:16,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,703 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 29 treesize of output 23 [2021-06-05 14:26:16,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,708 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 17 treesize of output 13 [2021-06-05 14:26:16,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,712 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 19 treesize of output 15 [2021-06-05 14:26:16,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,717 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 28 treesize of output 22 [2021-06-05 14:26:16,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:16,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,724 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 [2021-06-05 14:26:16,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:16,728 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,731 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 18 treesize of output 14 [2021-06-05 14:26:16,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,736 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 15 treesize of output 11 [2021-06-05 14:26:16,736 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:16,739 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,809 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-05 14:26:16,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:16,812 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 [2021-06-05 14:26:16,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,814 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 21 treesize of output 7 [2021-06-05 14:26:16,815 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:16,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:16,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:16,844 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-05 14:26:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361999864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:16,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:16,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:16,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604817662] [2021-06-05 14:26:16,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:16,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:16,964 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) [2021-06-05 14:26:17,733 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 14:26:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:18,130 INFO L93 Difference]: Finished difference Result 608 states and 1875 transitions. [2021-06-05 14:26:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:18,130 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 [2021-06-05 14:26:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:18,131 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:26:18,131 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 14:26:18,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1190.1ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 14:26:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 400. [2021-06-05 14:26:18,135 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) [2021-06-05 14:26:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1289 transitions. [2021-06-05 14:26:18,136 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1289 transitions. Word has length 18 [2021-06-05 14:26:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:18,136 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1289 transitions. [2021-06-05 14:26:18,136 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) [2021-06-05 14:26:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1289 transitions. [2021-06-05 14:26:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:18,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:18,137 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:18,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6206,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:18,337 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2097338382, now seen corresponding path program 213 times [2021-06-05 14:26:18,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:18,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131516481] [2021-06-05 14:26:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:18,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:18,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131516481] [2021-06-05 14:26:18,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131516481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:18,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215975246] [2021-06-05 14:26:18,450 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 [2021-06-05 14:26:18,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:26:18,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,822 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 16 treesize of output 12 [2021-06-05 14:26:18,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,827 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 [2021-06-05 14:26:18,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,831 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 26 treesize of output 20 [2021-06-05 14:26:18,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,835 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 15 treesize of output 11 [2021-06-05 14:26:18,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,840 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 [2021-06-05 14:26:18,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:18,843 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 16 treesize of output 12 [2021-06-05 14:26:18,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:18,956 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:26:18,957 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:26:18,961 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. [2021-06-05 14:26:18,961 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:26:19,118 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-05 14:26:19,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:26:19,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:19,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:19,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:19,144 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:26:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:19,146 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 21 treesize of output 7 [2021-06-05 14:26:19,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:19,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:19,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:19,154 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:26:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:19,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215975246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:19,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:19,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098185921] [2021-06-05 14:26:19,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:19,176 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) [2021-06-05 14:26:19,797 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 14:26:19,933 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 14:26:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:20,045 INFO L93 Difference]: Finished difference Result 569 states and 1747 transitions. [2021-06-05 14:26:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:20,045 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 [2021-06-05 14:26:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:20,046 INFO L225 Difference]: With dead ends: 569 [2021-06-05 14:26:20,046 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:26:20,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1036.7ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:26:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 406. [2021-06-05 14:26:20,050 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) [2021-06-05 14:26:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1304 transitions. [2021-06-05 14:26:20,050 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1304 transitions. Word has length 18 [2021-06-05 14:26:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1304 transitions. [2021-06-05 14:26:20,051 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) [2021-06-05 14:26:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1304 transitions. [2021-06-05 14:26:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:20,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:20,051 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:20,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6221 [2021-06-05 14:26:20,252 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash -716391044, now seen corresponding path program 214 times [2021-06-05 14:26:20,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:20,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584982123] [2021-06-05 14:26:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:20,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584982123] [2021-06-05 14:26:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584982123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419906409] [2021-06-05 14:26:20,374 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 [2021-06-05 14:26:20,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:20,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,652 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 [2021-06-05 14:26:20,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,657 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 15 treesize of output 11 [2021-06-05 14:26:20,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,661 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 [2021-06-05 14:26:20,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,665 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 16 treesize of output 12 [2021-06-05 14:26:20,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,669 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 25 treesize of output 19 [2021-06-05 14:26:20,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,673 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 26 treesize of output 20 [2021-06-05 14:26:20,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,788 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:26:20,788 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:26:20,792 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. [2021-06-05 14:26:20,792 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:26:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:20,917 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 [2021-06-05 14:26:20,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:20,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:20,984 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-06-05 14:26:20,987 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 27 treesize of output 21 [2021-06-05 14:26:20,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:21,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:21,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:21,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:21,018 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 11 treesize of output 3 [2021-06-05 14:26:21,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:21,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:21,021 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 21 treesize of output 7 [2021-06-05 14:26:21,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:21,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:21,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:21,054 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:21,056 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 7 treesize of output 5 [2021-06-05 14:26:21,057 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:21,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:21,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1621 vanished before elimination [2021-06-05 14:26:21,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:21,082 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:26:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:21,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419906409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:21,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:21,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:21,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054876706] [2021-06-05 14:26:21,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:21,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:21,142 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) [2021-06-05 14:26:21,734 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-05 14:26:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:21,968 INFO L93 Difference]: Finished difference Result 568 states and 1745 transitions. [2021-06-05 14:26:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:21,968 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 [2021-06-05 14:26:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:21,969 INFO L225 Difference]: With dead ends: 568 [2021-06-05 14:26:21,969 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:26:21,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 997.6ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:26:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 404. [2021-06-05 14:26:21,973 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) [2021-06-05 14:26:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1299 transitions. [2021-06-05 14:26:21,974 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1299 transitions. Word has length 18 [2021-06-05 14:26:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:21,974 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1299 transitions. [2021-06-05 14:26:21,974 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) [2021-06-05 14:26:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1299 transitions. [2021-06-05 14:26:21,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:21,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:21,974 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:22,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6237,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:22,179 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2032548348, now seen corresponding path program 215 times [2021-06-05 14:26:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:22,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063831302] [2021-06-05 14:26:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:22,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:22,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063831302] [2021-06-05 14:26:22,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063831302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:22,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575210355] [2021-06-05 14:26:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:26:22,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:26:22,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:22,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,593 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 [2021-06-05 14:26:22,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:22,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,597 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 25 treesize of output 19 [2021-06-05 14:26:22,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,663 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 17 treesize of output 13 [2021-06-05 14:26:22,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:22,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,729 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 17 treesize of output 13 [2021-06-05 14:26:22,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,733 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 15 treesize of output 11 [2021-06-05 14:26:22,734 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:22,792 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. [2021-06-05 14:26:22,792 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:26:22,954 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:26:22,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,958 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 26 treesize of output 20 [2021-06-05 14:26:22,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,963 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 28 treesize of output 22 [2021-06-05 14:26:22,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,968 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 19 treesize of output 15 [2021-06-05 14:26:22,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:22,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,977 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 [2021-06-05 14:26:22,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:22,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:22,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,991 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 16 treesize of output 12 [2021-06-05 14:26:22,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:22,995 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 [2021-06-05 14:26:22,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:22,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,000 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 29 treesize of output 23 [2021-06-05 14:26:23,001 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,004 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 17 treesize of output 13 [2021-06-05 14:26:23,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:23,009 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,151 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 14:26:23,151 INFO L628 ElimStorePlain]: treesize reduction 95, result has 60.4 percent of original size [2021-06-05 14:26:23,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,155 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 9 treesize of output 3 [2021-06-05 14:26:23,155 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,159 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 [2021-06-05 14:26:23,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:23,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:26:23,163 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:23,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:23,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:26:23,217 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-05 14:26:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575210355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:23,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:23,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:23,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22034041] [2021-06-05 14:26:23,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:23,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:23,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:23,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:23,301 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) [2021-06-05 14:26:23,970 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2021-06-05 14:26:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:24,217 INFO L93 Difference]: Finished difference Result 570 states and 1750 transitions. [2021-06-05 14:26:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:26:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:24,218 INFO L225 Difference]: With dead ends: 570 [2021-06-05 14:26:24,218 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:26:24,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:26:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:26:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 402. [2021-06-05 14:26:24,224 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) [2021-06-05 14:26:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1294 transitions. [2021-06-05 14:26:24,225 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1294 transitions. Word has length 18 [2021-06-05 14:26:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:24,225 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1294 transitions. [2021-06-05 14:26:24,225 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) [2021-06-05 14:26:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1294 transitions. [2021-06-05 14:26:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:24,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:24,226 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:24,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6255 [2021-06-05 14:26:24,429 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1727189146, now seen corresponding path program 216 times [2021-06-05 14:26:24,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:24,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307962712] [2021-06-05 14:26:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307962712] [2021-06-05 14:26:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307962712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240246450] [2021-06-05 14:26:24,561 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 [2021-06-05 14:26:24,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:26:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,695 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 24 treesize of output 18 [2021-06-05 14:26:24,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,699 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 34 treesize of output 26 [2021-06-05 14:26:24,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,704 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 [2021-06-05 14:26:24,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,709 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 35 treesize of output 27 [2021-06-05 14:26:24,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,714 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 [2021-06-05 14:26:24,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:24,718 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 [2021-06-05 14:26:24,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:24,850 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 14:26:24,851 INFO L628 ElimStorePlain]: treesize reduction 68, result has 76.3 percent of original size [2021-06-05 14:26:24,858 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. [2021-06-05 14:26:24,858 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:247, output treesize:219 [2021-06-05 14:26:25,109 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-05 14:26:25,179 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-05 14:26:25,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,185 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 29 treesize of output 23 [2021-06-05 14:26:25,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,191 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 26 treesize of output 20 [2021-06-05 14:26:25,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,197 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 46 treesize of output 36 [2021-06-05 14:26:25,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,203 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 26 treesize of output 20 [2021-06-05 14:26:25,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,209 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 47 treesize of output 37 [2021-06-05 14:26:25,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,215 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 [2021-06-05 14:26:25,216 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,221 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 28 treesize of output 22 [2021-06-05 14:26:25,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,226 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 29 treesize of output 23 [2021-06-05 14:26:25,227 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,232 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 29 treesize of output 23 [2021-06-05 14:26:25,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:25,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,238 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 [2021-06-05 14:26:25,239 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,245 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 15 treesize of output 11 [2021-06-05 14:26:25,245 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,251 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 28 treesize of output 22 [2021-06-05 14:26:25,252 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:25,260 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,267 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 25 treesize of output 19 [2021-06-05 14:26:25,268 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,490 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-05 14:26:25,490 INFO L628 ElimStorePlain]: treesize reduction 252, result has 44.7 percent of original size [2021-06-05 14:26:25,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:25,495 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:25,499 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 [2021-06-05 14:26:25,500 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:25,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:25,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:26:25,582 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:659, output treesize:116 [2021-06-05 14:26:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:25,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240246450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:25,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:25,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372767727] [2021-06-05 14:26:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:25,729 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) [2021-06-05 14:26:26,329 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-06-05 14:26:26,506 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 14:26:26,843 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-06-05 14:26:27,077 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-06-05 14:26:27,368 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-05 14:26:27,591 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-06-05 14:26:27,844 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-06-05 14:26:28,129 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-05 14:26:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:28,249 INFO L93 Difference]: Finished difference Result 694 states and 2070 transitions. [2021-06-05 14:26:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:28,249 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 [2021-06-05 14:26:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:28,250 INFO L225 Difference]: With dead ends: 694 [2021-06-05 14:26:28,250 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:26:28,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2339.1ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:26:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:26:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 408. [2021-06-05 14:26:28,259 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) [2021-06-05 14:26:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1321 transitions. [2021-06-05 14:26:28,260 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1321 transitions. Word has length 18 [2021-06-05 14:26:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:28,260 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1321 transitions. [2021-06-05 14:26:28,260 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) [2021-06-05 14:26:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1321 transitions. [2021-06-05 14:26:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:28,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:28,260 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:28,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6284 [2021-06-05 14:26:28,461 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228754, now seen corresponding path program 217 times [2021-06-05 14:26:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:28,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286089741] [2021-06-05 14:26:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:28,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286089741] [2021-06-05 14:26:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286089741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828219930] [2021-06-05 14:26:28,554 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 [2021-06-05 14:26:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,667 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 27 treesize of output 21 [2021-06-05 14:26:28,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:28,671 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 26 treesize of output 20 [2021-06-05 14:26:28,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:28,674 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 17 treesize of output 13 [2021-06-05 14:26:28,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:28,716 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-06-05 14:26:28,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:28,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-06-05 14:26:28,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:26:28,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:28,798 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:26:28,798 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:28,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:28,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:26:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:28,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828219930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:28,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:28,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:26:28,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111791510] [2021-06-05 14:26:28,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:26:28,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:28,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:26:28,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:26:28,818 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) [2021-06-05 14:26:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:29,173 INFO L93 Difference]: Finished difference Result 589 states and 1818 transitions. [2021-06-05 14:26:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:29,173 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 [2021-06-05 14:26:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:29,174 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:26:29,174 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:26:29,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:26:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 423. [2021-06-05 14:26:29,178 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) [2021-06-05 14:26:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1370 transitions. [2021-06-05 14:26:29,179 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1370 transitions. Word has length 18 [2021-06-05 14:26:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:29,179 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1370 transitions. [2021-06-05 14:26:29,179 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) [2021-06-05 14:26:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1370 transitions. [2021-06-05 14:26:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:29,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:29,180 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:29,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-05 14:26:29,380 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -876759992, now seen corresponding path program 218 times [2021-06-05 14:26:29,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:29,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739413442] [2021-06-05 14:26:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:29,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:29,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739413442] [2021-06-05 14:26:29,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739413442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:29,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930618875] [2021-06-05 14:26:29,475 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 [2021-06-05 14:26:29,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:29,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:29,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:29,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,593 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 [2021-06-05 14:26:29,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:29,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,599 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 17 treesize of output 13 [2021-06-05 14:26:29,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,641 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-06-05 14:26:29,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:29,642 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-06-05 14:26:29,687 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1637, array_0], 1=[v_prenex_1638, array_4]} [2021-06-05 14:26:29,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:26:29,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,693 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 [2021-06-05 14:26:29,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,731 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-06-05 14:26:29,733 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 27 treesize of output 21 [2021-06-05 14:26:29,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:29,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,752 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1638 vanished before elimination [2021-06-05 14:26:29,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:29,754 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 11 treesize of output 3 [2021-06-05 14:26:29,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,756 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 21 treesize of output 7 [2021-06-05 14:26:29,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:29,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:29,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:29,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-05 14:26:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:29,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930618875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:29,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:29,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:26:29,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290438439] [2021-06-05 14:26:29,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:26:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:26:29,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:26:29,841 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) [2021-06-05 14:26:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:30,215 INFO L93 Difference]: Finished difference Result 593 states and 1835 transitions. [2021-06-05 14:26:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:30,215 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 [2021-06-05 14:26:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:30,216 INFO L225 Difference]: With dead ends: 593 [2021-06-05 14:26:30,216 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:26:30,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:26:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:26:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 417. [2021-06-05 14:26:30,220 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) [2021-06-05 14:26:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1348 transitions. [2021-06-05 14:26:30,221 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1348 transitions. Word has length 18 [2021-06-05 14:26:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:30,221 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1348 transitions. [2021-06-05 14:26:30,221 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) [2021-06-05 14:26:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1348 transitions. [2021-06-05 14:26:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:30,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:30,222 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:30,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6308,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:30,432 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:30,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1750500672, now seen corresponding path program 219 times [2021-06-05 14:26:30,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:30,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672362016] [2021-06-05 14:26:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:30,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:30,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672362016] [2021-06-05 14:26:30,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672362016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:30,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171887864] [2021-06-05 14:26:30,525 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 [2021-06-05 14:26:30,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:30,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,670 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 25 treesize of output 19 [2021-06-05 14:26:30,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:30,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:30,702 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. [2021-06-05 14:26:30,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:26:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,773 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 17 treesize of output 13 [2021-06-05 14:26:30,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:30,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,827 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:26:30,828 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:30,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,830 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 [2021-06-05 14:26:30,831 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:30,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:30,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:30,857 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 21 treesize of output 7 [2021-06-05 14:26:30,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:26:30,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:30,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:30,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:30,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:30,889 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-05 14:26:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:30,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171887864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:30,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:30,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660404701] [2021-06-05 14:26:30,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:30,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:30,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:30,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:30,949 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) [2021-06-05 14:26:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:31,510 INFO L93 Difference]: Finished difference Result 604 states and 1871 transitions. [2021-06-05 14:26:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:26:31,510 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 [2021-06-05 14:26:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:31,511 INFO L225 Difference]: With dead ends: 604 [2021-06-05 14:26:31,511 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:26:31,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:26:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:26:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 411. [2021-06-05 14:26:31,515 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) [2021-06-05 14:26:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1330 transitions. [2021-06-05 14:26:31,516 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1330 transitions. Word has length 18 [2021-06-05 14:26:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:31,516 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1330 transitions. [2021-06-05 14:26:31,516 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) [2021-06-05 14:26:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1330 transitions. [2021-06-05 14:26:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:31,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:31,516 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:31,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6318,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:31,717 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1973011818, now seen corresponding path program 220 times [2021-06-05 14:26:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351318364] [2021-06-05 14:26:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:31,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351318364] [2021-06-05 14:26:31,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351318364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:31,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682699600] [2021-06-05 14:26:31,811 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 [2021-06-05 14:26:31,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:31,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:31,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:31,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:31,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:31,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:31,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:31,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:31,999 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. [2021-06-05 14:26:31,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:50 [2021-06-05 14:26:32,079 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:26:32,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:32,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:32,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:32,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,095 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 35 treesize of output 27 [2021-06-05 14:26:32,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:32,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 14:26:32,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,103 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:32,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,174 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-05 14:26:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,177 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 21 treesize of output 7 [2021-06-05 14:26:32,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:32,181 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 [2021-06-05 14:26:32,181 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:32,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:32,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:32,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:32,211 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:26:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:32,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682699600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:32,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:32,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:32,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880479554] [2021-06-05 14:26:32,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:32,270 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) [2021-06-05 14:26:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:32,861 INFO L93 Difference]: Finished difference Result 642 states and 1992 transitions. [2021-06-05 14:26:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:26:32,861 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 [2021-06-05 14:26:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:32,862 INFO L225 Difference]: With dead ends: 642 [2021-06-05 14:26:32,862 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 14:26:32,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:26:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 14:26:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 402. [2021-06-05 14:26:32,867 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) [2021-06-05 14:26:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1297 transitions. [2021-06-05 14:26:32,867 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1297 transitions. Word has length 18 [2021-06-05 14:26:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:32,867 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1297 transitions. [2021-06-05 14:26:32,867 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) [2021-06-05 14:26:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1297 transitions. [2021-06-05 14:26:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:32,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:32,868 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:33,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6331,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:33,068 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -615142990, now seen corresponding path program 221 times [2021-06-05 14:26:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:33,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44473102] [2021-06-05 14:26:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:33,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44473102] [2021-06-05 14:26:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44473102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071730824] [2021-06-05 14:26:33,235 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 [2021-06-05 14:26:33,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:33,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:33,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:33,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,506 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 16 treesize of output 12 [2021-06-05 14:26:33,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,511 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 25 treesize of output 19 [2021-06-05 14:26:33,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,515 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 [2021-06-05 14:26:33,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:33,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,523 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 26 treesize of output 20 [2021-06-05 14:26:33,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,527 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 15 treesize of output 11 [2021-06-05 14:26:33,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,642 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:26:33,642 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:26:33,646 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. [2021-06-05 14:26:33,646 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:26:33,814 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1650], 1=[array_0, v_prenex_1649]} [2021-06-05 14:26:33,817 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 27 treesize of output 21 [2021-06-05 14:26:33,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:33,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:33,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,862 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:26:33,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:33,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,882 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 21 treesize of output 7 [2021-06-05 14:26:33,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:33,885 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 11 treesize of output 3 [2021-06-05 14:26:33,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:33,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:33,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:33,906 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1649 vanished before elimination [2021-06-05 14:26:33,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:33,907 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:26:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:33,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071730824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:33,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:33,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556650755] [2021-06-05 14:26:33,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:33,932 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) [2021-06-05 14:26:34,663 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 14:26:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:35,276 INFO L93 Difference]: Finished difference Result 581 states and 1782 transitions. [2021-06-05 14:26:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:26:35,277 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 [2021-06-05 14:26:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:35,277 INFO L225 Difference]: With dead ends: 581 [2021-06-05 14:26:35,277 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 14:26:35,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1315.3ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 14:26:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 408. [2021-06-05 14:26:35,282 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) [2021-06-05 14:26:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1312 transitions. [2021-06-05 14:26:35,282 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1312 transitions. Word has length 18 [2021-06-05 14:26:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:35,282 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1312 transitions. [2021-06-05 14:26:35,282 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) [2021-06-05 14:26:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1312 transitions. [2021-06-05 14:26:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:35,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:35,283 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:35,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6342 [2021-06-05 14:26:35,484 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 866094880, now seen corresponding path program 222 times [2021-06-05 14:26:35,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:35,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391849953] [2021-06-05 14:26:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:35,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:35,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391849953] [2021-06-05 14:26:35,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391849953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:35,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479275854] [2021-06-05 14:26:35,785 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 [2021-06-05 14:26:35,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:26:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,039 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 16 treesize of output 12 [2021-06-05 14:26:36,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,043 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 15 treesize of output 11 [2021-06-05 14:26:36,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,047 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 25 treesize of output 19 [2021-06-05 14:26:36,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,052 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 15 treesize of output 11 [2021-06-05 14:26:36,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:36,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,060 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 16 treesize of output 12 [2021-06-05 14:26:36,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,176 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:26:36,176 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:26:36,180 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. [2021-06-05 14:26:36,180 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-05 14:26:36,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,309 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 [2021-06-05 14:26:36,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:36,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,369 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-06-05 14:26:36,372 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 [2021-06-05 14:26:36,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:36,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:36,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:36,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:36,436 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1660 vanished before elimination [2021-06-05 14:26:36,436 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:36,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,440 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 11 treesize of output 3 [2021-06-05 14:26:36,440 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:36,443 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 21 treesize of output 7 [2021-06-05 14:26:36,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:36,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:36,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:36,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:36,475 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-05 14:26:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:36,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479275854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:36,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:36,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:36,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152556439] [2021-06-05 14:26:36,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:36,538 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) [2021-06-05 14:26:37,257 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-05 14:26:37,521 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 14:26:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:37,904 INFO L93 Difference]: Finished difference Result 592 states and 1804 transitions. [2021-06-05 14:26:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:26:37,905 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 [2021-06-05 14:26:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:37,906 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:26:37,906 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:26:37,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1481.0ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:26:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 409. [2021-06-05 14:26:37,910 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) [2021-06-05 14:26:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1322 transitions. [2021-06-05 14:26:37,911 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1322 transitions. Word has length 18 [2021-06-05 14:26:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:37,911 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1322 transitions. [2021-06-05 14:26:37,911 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) [2021-06-05 14:26:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1322 transitions. [2021-06-05 14:26:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:37,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:37,911 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:38,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6362 [2021-06-05 14:26:38,112 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash -450062424, now seen corresponding path program 223 times [2021-06-05 14:26:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:38,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894400375] [2021-06-05 14:26:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894400375] [2021-06-05 14:26:38,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894400375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:38,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756374388] [2021-06-05 14:26:38,273 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 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 [2021-06-05 14:26:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:38,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:38,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,619 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 17 treesize of output 13 [2021-06-05 14:26:38,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,623 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 [2021-06-05 14:26:38,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:38,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,683 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 27 treesize of output 21 [2021-06-05 14:26:38,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:38,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:38,743 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. [2021-06-05 14:26:38,743 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-05 14:26:38,913 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:26:38,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,917 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 17 treesize of output 13 [2021-06-05 14:26:38,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,922 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 [2021-06-05 14:26:38,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,926 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 26 treesize of output 20 [2021-06-05 14:26:38,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:26:38,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,936 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 15 treesize of output 11 [2021-06-05 14:26:38,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,940 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 15 treesize of output 11 [2021-06-05 14:26:38,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,945 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 28 treesize of output 22 [2021-06-05 14:26:38,946 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,950 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 20 treesize of output 16 [2021-06-05 14:26:38,951 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,955 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 [2021-06-05 14:26:38,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,963 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 18 treesize of output 14 [2021-06-05 14:26:38,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:38,968 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 29 treesize of output 23 [2021-06-05 14:26:38,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:38,972 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 16 treesize of output 12 [2021-06-05 14:26:38,973 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,103 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 14:26:39,104 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-06-05 14:26:39,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:39,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:39,108 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 [2021-06-05 14:26:39,108 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:39,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:39,112 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 9 treesize of output 3 [2021-06-05 14:26:39,113 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:39,116 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 11 treesize of output 3 [2021-06-05 14:26:39,116 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:39,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:39,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:26:39,170 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-05 14:26:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756374388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:39,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:39,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364445908] [2021-06-05 14:26:39,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:39,254 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) [2021-06-05 14:26:39,929 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2021-06-05 14:26:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:40,173 INFO L93 Difference]: Finished difference Result 577 states and 1789 transitions. [2021-06-05 14:26:40,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:26:40,173 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 [2021-06-05 14:26:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:40,174 INFO L225 Difference]: With dead ends: 577 [2021-06-05 14:26:40,174 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:26:40,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1100.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:26:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:26:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 407. [2021-06-05 14:26:40,178 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) [2021-06-05 14:26:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1317 transitions. [2021-06-05 14:26:40,179 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1317 transitions. Word has length 18 [2021-06-05 14:26:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:40,179 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1317 transitions. [2021-06-05 14:26:40,179 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) [2021-06-05 14:26:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1317 transitions. [2021-06-05 14:26:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:40,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:40,180 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:40,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6384 [2021-06-05 14:26:40,401 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:40,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1931932108, now seen corresponding path program 224 times [2021-06-05 14:26:40,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:40,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714239256] [2021-06-05 14:26:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:40,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:40,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714239256] [2021-06-05 14:26:40,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714239256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:40,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105891563] [2021-06-05 14:26:40,529 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 [2021-06-05 14:26:40,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:40,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,679 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 [2021-06-05 14:26:40,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,683 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 15 treesize of output 11 [2021-06-05 14:26:40,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,687 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 24 treesize of output 18 [2021-06-05 14:26:40,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,744 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.2 percent of original size [2021-06-05 14:26:40,746 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. [2021-06-05 14:26:40,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-06-05 14:26:40,864 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1672], 1=[array_0, v_prenex_1671]} [2021-06-05 14:26:40,868 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 25 treesize of output 19 [2021-06-05 14:26:40,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,872 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 15 treesize of output 11 [2021-06-05 14:26:40,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,909 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:26:40,911 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 27 treesize of output 21 [2021-06-05 14:26:40,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:40,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:40,927 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:26:40,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,930 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 21 treesize of output 7 [2021-06-05 14:26:40,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:40,933 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 11 treesize of output 3 [2021-06-05 14:26:40,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:40,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:40,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:40,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:40,954 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:26:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:40,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105891563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:40,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:40,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406807932] [2021-06-05 14:26:40,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:40,981 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) [2021-06-05 14:26:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:41,481 INFO L93 Difference]: Finished difference Result 575 states and 1776 transitions. [2021-06-05 14:26:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:41,482 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 [2021-06-05 14:26:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:41,482 INFO L225 Difference]: With dead ends: 575 [2021-06-05 14:26:41,482 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:26:41,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:26:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 403. [2021-06-05 14:26:41,487 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) [2021-06-05 14:26:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1306 transitions. [2021-06-05 14:26:41,488 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1306 transitions. Word has length 18 [2021-06-05 14:26:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:41,488 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1306 transitions. [2021-06-05 14:26:41,488 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) [2021-06-05 14:26:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1306 transitions. [2021-06-05 14:26:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:41,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:41,489 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:41,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6413,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:41,701 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -881797318, now seen corresponding path program 225 times [2021-06-05 14:26:41,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:41,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066151811] [2021-06-05 14:26:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:41,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:41,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066151811] [2021-06-05 14:26:41,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066151811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:41,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753129554] [2021-06-05 14:26:41,801 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 [2021-06-05 14:26:41,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:41,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:41,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,952 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 15 treesize of output 11 [2021-06-05 14:26:41,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:41,955 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 [2021-06-05 14:26:41,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:41,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:41,983 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. [2021-06-05 14:26:41,983 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-05 14:26:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,048 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 [2021-06-05 14:26:42,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:42,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,052 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 15 treesize of output 11 [2021-06-05 14:26:42,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:42,103 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 14:26:42,103 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:42,106 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 [2021-06-05 14:26:42,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:42,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:42,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:42,136 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 11 treesize of output 3 [2021-06-05 14:26:42,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:42,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:42,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:42,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:42,166 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-05 14:26:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:42,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753129554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:42,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:42,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:42,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613493329] [2021-06-05 14:26:42,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:42,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:42,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:42,233 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) [2021-06-05 14:26:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:42,758 INFO L93 Difference]: Finished difference Result 555 states and 1722 transitions. [2021-06-05 14:26:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:26:42,759 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 [2021-06-05 14:26:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:42,759 INFO L225 Difference]: With dead ends: 555 [2021-06-05 14:26:42,759 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:26:42,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:26:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:26:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 387. [2021-06-05 14:26:42,764 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) [2021-06-05 14:26:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1252 transitions. [2021-06-05 14:26:42,764 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1252 transitions. Word has length 18 [2021-06-05 14:26:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:42,764 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1252 transitions. [2021-06-05 14:26:42,764 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) [2021-06-05 14:26:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1252 transitions. [2021-06-05 14:26:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:42,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:42,765 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:42,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6429 [2021-06-05 14:26:42,965 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1014303434, now seen corresponding path program 226 times [2021-06-05 14:26:42,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:42,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131607589] [2021-06-05 14:26:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:43,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131607589] [2021-06-05 14:26:43,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131607589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907832541] [2021-06-05 14:26:43,123 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 [2021-06-05 14:26:43,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:43,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:43,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,258 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 34 treesize of output 26 [2021-06-05 14:26:43,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,262 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 24 treesize of output 18 [2021-06-05 14:26:43,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:43,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,270 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 35 treesize of output 27 [2021-06-05 14:26:43,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:43,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,391 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:26:43,392 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.0 percent of original size [2021-06-05 14:26:43,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:43,393 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-05 14:26:43,704 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 14:26:43,842 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-05 14:26:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,848 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 27 treesize of output 21 [2021-06-05 14:26:43,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,853 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 [2021-06-05 14:26:43,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,859 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 28 treesize of output 22 [2021-06-05 14:26:43,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:43,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,870 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 28 treesize of output 22 [2021-06-05 14:26:43,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,876 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 27 treesize of output 21 [2021-06-05 14:26:43,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,881 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 [2021-06-05 14:26:43,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,887 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 [2021-06-05 14:26:43,888 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:43,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,897 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 16 treesize of output 12 [2021-06-05 14:26:43,898 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,903 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 25 treesize of output 19 [2021-06-05 14:26:43,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,908 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 28 treesize of output 22 [2021-06-05 14:26:43,921 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:43,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:43,929 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:43,934 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 16 treesize of output 12 [2021-06-05 14:26:43,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,107 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 14:26:44,108 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:26:44,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,112 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 20 treesize of output 9 [2021-06-05 14:26:44,113 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:44,116 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 20 treesize of output 9 [2021-06-05 14:26:44,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:44,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:44,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:26:44,175 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:26:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:44,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907832541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:44,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:44,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571619822] [2021-06-05 14:26:44,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:44,267 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) [2021-06-05 14:26:44,797 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:26:45,197 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2021-06-05 14:26:45,664 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 14:26:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:45,849 INFO L93 Difference]: Finished difference Result 571 states and 1741 transitions. [2021-06-05 14:26:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:45,849 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 [2021-06-05 14:26:45,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:45,850 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:26:45,850 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 14:26:45,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1727.9ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:26:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 14:26:45,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 386. [2021-06-05 14:26:45,854 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) [2021-06-05 14:26:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1244 transitions. [2021-06-05 14:26:45,855 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1244 transitions. Word has length 18 [2021-06-05 14:26:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:45,855 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1244 transitions. [2021-06-05 14:26:45,855 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) [2021-06-05 14:26:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1244 transitions. [2021-06-05 14:26:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:45,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:45,856 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6442,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:26:46,065 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1851708756, now seen corresponding path program 227 times [2021-06-05 14:26:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:46,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885122288] [2021-06-05 14:26:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:46,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885122288] [2021-06-05 14:26:46,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885122288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:46,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780555887] [2021-06-05 14:26:46,269 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 [2021-06-05 14:26:46,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:46,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:46,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:46,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,412 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 26 treesize of output 20 [2021-06-05 14:26:46,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:46,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,420 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 [2021-06-05 14:26:46,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,423 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 [2021-06-05 14:26:46,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,500 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-05 14:26:46,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:46,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-05 14:26:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,735 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 17 treesize of output 13 [2021-06-05 14:26:46,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,740 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 15 treesize of output 11 [2021-06-05 14:26:46,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,803 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-06-05 14:26:46,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,806 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 [2021-06-05 14:26:46,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:46,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,834 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:46,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:46,837 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 [2021-06-05 14:26:46,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,840 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 11 treesize of output 3 [2021-06-05 14:26:46,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:46,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:46,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:46,901 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1689 vanished before elimination [2021-06-05 14:26:46,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:46,902 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-06-05 14:26:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:46,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780555887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:46,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:46,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:46,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492575992] [2021-06-05 14:26:46,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:46,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:46,987 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) [2021-06-05 14:26:47,468 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 14:26:47,667 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:26:47,928 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 14:26:48,313 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 14:26:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:48,488 INFO L93 Difference]: Finished difference Result 542 states and 1658 transitions. [2021-06-05 14:26:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:26:48,488 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 [2021-06-05 14:26:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:48,489 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:26:48,489 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 14:26:48,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1571.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:26:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 14:26:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 385. [2021-06-05 14:26:48,493 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) [2021-06-05 14:26:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-06-05 14:26:48,493 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-06-05 14:26:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:48,494 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-06-05 14:26:48,494 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) [2021-06-05 14:26:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-06-05 14:26:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:48,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:48,494 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:48,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6475 [2021-06-05 14:26:48,695 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -332880908, now seen corresponding path program 228 times [2021-06-05 14:26:48,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:48,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278331031] [2021-06-05 14:26:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:48,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:48,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278331031] [2021-06-05 14:26:48,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278331031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:48,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480502188] [2021-06-05 14:26:48,855 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 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 [2021-06-05 14:26:48,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:26:48,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:48,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,971 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 25 treesize of output 19 [2021-06-05 14:26:48,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:26:48,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:26:48,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:48,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,988 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 [2021-06-05 14:26:48,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:48,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:48,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,083 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-05 14:26:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:49,084 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:49,320 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1697], 1=[array_0, v_prenex_1696]} [2021-06-05 14:26:49,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:49,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:49,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,358 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:26:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:26:49,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:49,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,376 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:26:49,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,379 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 [2021-06-05 14:26:49,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:26:49,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:49,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:49,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:49,404 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:26:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:49,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480502188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:49,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:49,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:49,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149618553] [2021-06-05 14:26:49,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:49,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:49,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:49,426 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) [2021-06-05 14:26:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:50,004 INFO L93 Difference]: Finished difference Result 530 states and 1636 transitions. [2021-06-05 14:26:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:50,005 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 [2021-06-05 14:26:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:50,005 INFO L225 Difference]: With dead ends: 530 [2021-06-05 14:26:50,006 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 14:26:50,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:26:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 14:26:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 388. [2021-06-05 14:26:50,010 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) [2021-06-05 14:26:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1255 transitions. [2021-06-05 14:26:50,010 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1255 transitions. Word has length 18 [2021-06-05 14:26:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:50,010 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1255 transitions. [2021-06-05 14:26:50,010 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) [2021-06-05 14:26:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1255 transitions. [2021-06-05 14:26:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:50,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:50,011 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:50,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6492 [2021-06-05 14:26:50,225 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2022097642, now seen corresponding path program 229 times [2021-06-05 14:26:50,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:50,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750083411] [2021-06-05 14:26:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:50,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750083411] [2021-06-05 14:26:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750083411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024704871] [2021-06-05 14:26:50,376 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 [2021-06-05 14:26:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,492 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 [2021-06-05 14:26:50,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,496 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 24 treesize of output 18 [2021-06-05 14:26:50,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,500 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 26 treesize of output 20 [2021-06-05 14:26:50,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,505 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 16 treesize of output 12 [2021-06-05 14:26:50,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:50,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:50,513 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,598 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-05 14:26:50,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:50,600 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:50,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,791 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 35 treesize of output 27 [2021-06-05 14:26:50,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:50,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,796 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 [2021-06-05 14:26:50,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,861 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-06-05 14:26:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:50,864 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 [2021-06-05 14:26:50,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,867 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 [2021-06-05 14:26:50,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:50,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:50,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:50,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:50,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:50,922 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1700 vanished before elimination [2021-06-05 14:26:50,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:26:50,923 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-06-05 14:26:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024704871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:50,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818350506] [2021-06-05 14:26:50,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:50,981 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) [2021-06-05 14:26:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:51,394 INFO L93 Difference]: Finished difference Result 551 states and 1687 transitions. [2021-06-05 14:26:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:26:51,394 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 [2021-06-05 14:26:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:51,395 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:26:51,395 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:26:51,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:26:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:26:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 385. [2021-06-05 14:26:51,399 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) [2021-06-05 14:26:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-06-05 14:26:51,400 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-06-05 14:26:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:51,400 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-06-05 14:26:51,400 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) [2021-06-05 14:26:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-06-05 14:26:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:51,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:51,400 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:51,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6510 [2021-06-05 14:26:51,601 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:51,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1074314582, now seen corresponding path program 230 times [2021-06-05 14:26:51,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:51,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579938906] [2021-06-05 14:26:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:51,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:51,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579938906] [2021-06-05 14:26:51,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579938906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:51,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424543620] [2021-06-05 14:26:51,777 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 [2021-06-05 14:26:51,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:26:51,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:51,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:51,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:51,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:51,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:51,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:51,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:51,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:51,944 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-05 14:26:51,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:51,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:26:52,130 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:26:52,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,134 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 [2021-06-05 14:26:52,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:52,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,138 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 25 treesize of output 19 [2021-06-05 14:26:52,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,142 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 17 treesize of output 13 [2021-06-05 14:26:52,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:52,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,217 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:26:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,221 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 [2021-06-05 14:26:52,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,224 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 [2021-06-05 14:26:52,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:52,235 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 9 treesize of output 3 [2021-06-05 14:26:52,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:52,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:52,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:52,273 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-05 14:26:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424543620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:52,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:52,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:52,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583199196] [2021-06-05 14:26:52,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:52,351 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) [2021-06-05 14:26:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:53,080 INFO L93 Difference]: Finished difference Result 540 states and 1665 transitions. [2021-06-05 14:26:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:53,080 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 [2021-06-05 14:26:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:53,081 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:26:53,081 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 14:26:53,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 14:26:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 386. [2021-06-05 14:26:53,084 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) [2021-06-05 14:26:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1245 transitions. [2021-06-05 14:26:53,085 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1245 transitions. Word has length 18 [2021-06-05 14:26:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:53,085 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1245 transitions. [2021-06-05 14:26:53,085 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) [2021-06-05 14:26:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1245 transitions. [2021-06-05 14:26:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:53,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:53,086 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:53,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6528 [2021-06-05 14:26:53,286 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1147687062, now seen corresponding path program 231 times [2021-06-05 14:26:53,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:53,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255226664] [2021-06-05 14:26:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:53,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:53,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255226664] [2021-06-05 14:26:53,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255226664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:53,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210743760] [2021-06-05 14:26:53,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:26:53,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:26:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:53,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,601 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 17 treesize of output 13 [2021-06-05 14:26:53,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,605 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 18 treesize of output 14 [2021-06-05 14:26:53,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:53,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,611 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 [2021-06-05 14:26:53,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,655 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-05 14:26:53,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:53,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:26:53,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,711 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 17 treesize of output 13 [2021-06-05 14:26:53,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,715 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 [2021-06-05 14:26:53,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:53,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:26:53,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:53,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,729 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 27 treesize of output 21 [2021-06-05 14:26:53,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:53,789 INFO L628 ElimStorePlain]: treesize reduction 79, result has 49.7 percent of original size [2021-06-05 14:26:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:53,792 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 21 treesize of output 7 [2021-06-05 14:26:53,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,794 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 11 treesize of output 3 [2021-06-05 14:26:53,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:53,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:53,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:53,827 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:26:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:53,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210743760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:53,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:53,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:26:53,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215216968] [2021-06-05 14:26:53,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:26:53,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:53,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:26:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:26:53,933 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) [2021-06-05 14:26:54,383 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 14:26:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:54,802 INFO L93 Difference]: Finished difference Result 551 states and 1681 transitions. [2021-06-05 14:26:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:26:54,802 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 [2021-06-05 14:26:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:54,803 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:26:54,803 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:26:54,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:26:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:26:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 386. [2021-06-05 14:26:54,807 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) [2021-06-05 14:26:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1246 transitions. [2021-06-05 14:26:54,807 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1246 transitions. Word has length 18 [2021-06-05 14:26:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:54,807 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1246 transitions. [2021-06-05 14:26:54,807 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) [2021-06-05 14:26:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1246 transitions. [2021-06-05 14:26:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:54,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:54,809 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:55,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6541 [2021-06-05 14:26:55,025 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash 843016612, now seen corresponding path program 232 times [2021-06-05 14:26:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:55,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291676117] [2021-06-05 14:26:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:55,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291676117] [2021-06-05 14:26:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291676117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940077348] [2021-06-05 14:26:55,229 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 [2021-06-05 14:26:55,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:26:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:55,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:26:55,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,366 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 34 treesize of output 26 [2021-06-05 14:26:55,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,370 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 24 treesize of output 18 [2021-06-05 14:26:55,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,374 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 [2021-06-05 14:26:55,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:26:55,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:26:55,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,383 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 [2021-06-05 14:26:55,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,497 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 14:26:55,497 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.3 percent of original size [2021-06-05 14:26:55,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:55,499 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-05 14:26:55,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,605 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 46 treesize of output 36 [2021-06-05 14:26:55,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,610 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 27 treesize of output 21 [2021-06-05 14:26:55,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:55,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,618 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 [2021-06-05 14:26:55,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,623 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 27 treesize of output 21 [2021-06-05 14:26:55,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:55,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,631 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 16 treesize of output 12 [2021-06-05 14:26:55,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:55,634 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:26:55,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,642 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 [2021-06-05 14:26:55,643 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,647 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 27 treesize of output 21 [2021-06-05 14:26:55,648 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,651 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 26 treesize of output 20 [2021-06-05 14:26:55,652 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,656 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 45 treesize of output 35 [2021-06-05 14:26:55,657 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,660 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 [2021-06-05 14:26:55,661 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,744 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-06-05 14:26:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:55,747 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 [2021-06-05 14:26:55,748 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,750 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 20 treesize of output 9 [2021-06-05 14:26:55,750 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:55,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:55,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:55,777 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-06-05 14:26:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940077348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:55,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:55,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531753165] [2021-06-05 14:26:55,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:55,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:55,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:55,892 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) [2021-06-05 14:26:56,402 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:26:56,974 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 14:26:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:57,226 INFO L93 Difference]: Finished difference Result 580 states and 1777 transitions. [2021-06-05 14:26:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:26:57,226 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 [2021-06-05 14:26:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:57,227 INFO L225 Difference]: With dead ends: 580 [2021-06-05 14:26:57,227 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:26:57,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1362.4ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:26:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:26:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 384. [2021-06-05 14:26:57,231 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) [2021-06-05 14:26:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1241 transitions. [2021-06-05 14:26:57,232 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1241 transitions. Word has length 18 [2021-06-05 14:26:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:57,232 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1241 transitions. [2021-06-05 14:26:57,232 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) [2021-06-05 14:26:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1241 transitions. [2021-06-05 14:26:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:57,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:57,232 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:57,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6554 [2021-06-05 14:26:57,433 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 325764, now seen corresponding path program 233 times [2021-06-05 14:26:57,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:57,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999438432] [2021-06-05 14:26:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:57,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999438432] [2021-06-05 14:26:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999438432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779770317] [2021-06-05 14:26:57,643 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 [2021-06-05 14:26:57,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:26:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:57,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:26:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:57,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:57,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,783 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 24 treesize of output 18 [2021-06-05 14:26:57,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,788 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 26 treesize of output 20 [2021-06-05 14:26:57,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:26:57,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,798 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 [2021-06-05 14:26:57,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:57,802 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 [2021-06-05 14:26:57,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:57,889 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-05 14:26:57,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:57,890 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:26:57,968 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]} [2021-06-05 14:26:57,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:26:57,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,063 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-05 14:26:58,063 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:26:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:26:58,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,099 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1713 vanished before elimination [2021-06-05 14:26:58,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,102 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 [2021-06-05 14:26:58,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:58,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:58,141 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 [2021-06-05 14:26:58,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,145 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 [2021-06-05 14:26:58,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:58,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:26:58,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:58,241 INFO L628 ElimStorePlain]: treesize reduction 14, result has 79.7 percent of original size [2021-06-05 14:26:58,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1711 vanished before elimination [2021-06-05 14:26:58,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:26:58,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-05 14:26:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:58,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779770317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:58,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:26:58,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:26:58,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248649920] [2021-06-05 14:26:58,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:26:58,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:26:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:26:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:26:58,358 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) [2021-06-05 14:26:58,732 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 14:26:59,024 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 14:26:59,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 14:26:59,317 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 14:26:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:26:59,411 INFO L93 Difference]: Finished difference Result 557 states and 1706 transitions. [2021-06-05 14:26:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:26:59,411 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 [2021-06-05 14:26:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:26:59,412 INFO L225 Difference]: With dead ends: 557 [2021-06-05 14:26:59,412 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:26:59,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1095.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:26:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:26:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 381. [2021-06-05 14:26:59,416 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) [2021-06-05 14:26:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1227 transitions. [2021-06-05 14:26:59,417 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1227 transitions. Word has length 18 [2021-06-05 14:26:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:26:59,417 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1227 transitions. [2021-06-05 14:26:59,417 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) [2021-06-05 14:26:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1227 transitions. [2021-06-05 14:26:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:26:59,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:26:59,417 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:26:59,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6575 [2021-06-05 14:26:59,618 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:26:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:26:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1454877628, now seen corresponding path program 234 times [2021-06-05 14:26:59,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:26:59,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060801714] [2021-06-05 14:26:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:26:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:26:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:26:59,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:26:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060801714] [2021-06-05 14:26:59,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060801714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:26:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941455911] [2021-06-05 14:26:59,786 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 [2021-06-05 14:26:59,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:26:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:26:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:26:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:26:59,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,929 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 27 treesize of output 21 [2021-06-05 14:26:59,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:26:59,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:26:59,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:59,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,937 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 15 treesize of output 11 [2021-06-05 14:26:59,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:59,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:26:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:26:59,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:26:59,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:26:59,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:26:59,980 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:27:00,325 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:27:00,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:00,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,335 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 20 treesize of output 16 [2021-06-05 14:27:00,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,340 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 16 treesize of output 12 [2021-06-05 14:27:00,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,344 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 29 treesize of output 23 [2021-06-05 14:27:00,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,349 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 [2021-06-05 14:27:00,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,354 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 17 treesize of output 13 [2021-06-05 14:27:00,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:27:00,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:00,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,368 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 16 treesize of output 12 [2021-06-05 14:27:00,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:00,374 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,378 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 15 treesize of output 11 [2021-06-05 14:27:00,378 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,382 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 18 treesize of output 14 [2021-06-05 14:27:00,383 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,535 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:27:00,535 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-06-05 14:27:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,540 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 11 treesize of output 3 [2021-06-05 14:27:00,540 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,544 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 21 treesize of output 7 [2021-06-05 14:27:00,545 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:00,548 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 9 treesize of output 3 [2021-06-05 14:27:00,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:00,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:00,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:27:00,612 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-06-05 14:27:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941455911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:00,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:00,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:00,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695360419] [2021-06-05 14:27:00,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:00,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:00,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:00,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:00,717 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) [2021-06-05 14:27:01,227 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:27:01,460 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-06-05 14:27:01,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 14:27:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:02,136 INFO L93 Difference]: Finished difference Result 560 states and 1699 transitions. [2021-06-05 14:27:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:02,136 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 [2021-06-05 14:27:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:02,137 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:27:02,137 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:27:02,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1471.5ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:27:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 385. [2021-06-05 14:27:02,141 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) [2021-06-05 14:27:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1233 transitions. [2021-06-05 14:27:02,141 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1233 transitions. Word has length 18 [2021-06-05 14:27:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:02,142 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1233 transitions. [2021-06-05 14:27:02,142 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) [2021-06-05 14:27:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1233 transitions. [2021-06-05 14:27:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:02,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:02,142 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:02,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6592,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:02,342 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2095137096, now seen corresponding path program 235 times [2021-06-05 14:27:02,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:02,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609177749] [2021-06-05 14:27:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:02,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609177749] [2021-06-05 14:27:02,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609177749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361224491] [2021-06-05 14:27:02,547 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 [2021-06-05 14:27:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:02,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,686 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 [2021-06-05 14:27:02,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,690 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 [2021-06-05 14:27:02,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,694 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 [2021-06-05 14:27:02,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,698 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 26 treesize of output 20 [2021-06-05 14:27:02,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,702 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 16 treesize of output 12 [2021-06-05 14:27:02,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:02,706 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 [2021-06-05 14:27:02,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:02,793 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-05 14:27:02,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:02,795 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:27:03,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:03,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:03,049 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 15 treesize of output 11 [2021-06-05 14:27:03,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:03,054 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 [2021-06-05 14:27:03,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:03,117 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-05 14:27:03,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:03,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:03,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:03,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:03,151 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 [2021-06-05 14:27:03,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:03,154 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 [2021-06-05 14:27:03,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:03,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:03,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:03,187 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1730 vanished before elimination [2021-06-05 14:27:03,189 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 [2021-06-05 14:27:03,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:03,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:03,214 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-05 14:27:03,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:03,216 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:27:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361224491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:03,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:03,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:03,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594474808] [2021-06-05 14:27:03,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:03,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:03,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:03,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:03,280 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) [2021-06-05 14:27:03,839 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 14:27:04,179 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-05 14:27:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:04,729 INFO L93 Difference]: Finished difference Result 602 states and 1813 transitions. [2021-06-05 14:27:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:27:04,729 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 [2021-06-05 14:27:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:04,730 INFO L225 Difference]: With dead ends: 602 [2021-06-05 14:27:04,730 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 14:27:04,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1519.2ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:27:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 14:27:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 390. [2021-06-05 14:27:04,738 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) [2021-06-05 14:27:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1263 transitions. [2021-06-05 14:27:04,739 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1263 transitions. Word has length 18 [2021-06-05 14:27:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:04,739 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1263 transitions. [2021-06-05 14:27:04,739 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) [2021-06-05 14:27:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1263 transitions. [2021-06-05 14:27:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:04,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:04,739 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:04,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6610,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:04,940 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash -125787926, now seen corresponding path program 236 times [2021-06-05 14:27:04,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:04,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766298475] [2021-06-05 14:27:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:05,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766298475] [2021-06-05 14:27:05,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766298475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131210176] [2021-06-05 14:27:05,062 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 [2021-06-05 14:27:05,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,178 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 [2021-06-05 14:27:05,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,182 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 [2021-06-05 14:27:05,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,186 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 26 treesize of output 20 [2021-06-05 14:27:05,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:05,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,231 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-05 14:27:05,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:05,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-05 14:27:05,376 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:27:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,380 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 [2021-06-05 14:27:05,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,384 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 25 treesize of output 19 [2021-06-05 14:27:05,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,388 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 34 treesize of output 26 [2021-06-05 14:27:05,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:05,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:27:05,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:05,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:05,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,471 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-06-05 14:27:05,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:05,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:05,478 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 21 treesize of output 7 [2021-06-05 14:27:05,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:05,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:05,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:05,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:05,508 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:27:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:05,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131210176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:05,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:05,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:05,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071809331] [2021-06-05 14:27:05,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:05,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:05,567 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) [2021-06-05 14:27:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:06,477 INFO L93 Difference]: Finished difference Result 635 states and 1947 transitions. [2021-06-05 14:27:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:27:06,477 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 [2021-06-05 14:27:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:06,478 INFO L225 Difference]: With dead ends: 635 [2021-06-05 14:27:06,478 INFO L226 Difference]: Without dead ends: 630 [2021-06-05 14:27:06,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:27:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-05 14:27:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 384. [2021-06-05 14:27:06,482 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) [2021-06-05 14:27:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1236 transitions. [2021-06-05 14:27:06,483 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1236 transitions. Word has length 18 [2021-06-05 14:27:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:06,483 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1236 transitions. [2021-06-05 14:27:06,483 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) [2021-06-05 14:27:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1236 transitions. [2021-06-05 14:27:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:06,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:06,483 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:06,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6633,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:06,684 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:06,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176344, now seen corresponding path program 237 times [2021-06-05 14:27:06,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:06,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441149873] [2021-06-05 14:27:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:06,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441149873] [2021-06-05 14:27:06,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441149873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571189333] [2021-06-05 14:27:06,880 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 [2021-06-05 14:27:06,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:27:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:06,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,023 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 27 treesize of output 21 [2021-06-05 14:27:07,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,028 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 [2021-06-05 14:27:07,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,032 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 [2021-06-05 14:27:07,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,035 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 [2021-06-05 14:27:07,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:07,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:07,076 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:27:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,160 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 18 treesize of output 14 [2021-06-05 14:27:07,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,164 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 29 treesize of output 23 [2021-06-05 14:27:07,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 14:27:07,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,173 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 17 treesize of output 13 [2021-06-05 14:27:07,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:07,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,181 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 28 treesize of output 22 [2021-06-05 14:27:07,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:07,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:07,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:07,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:07,195 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,263 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-05 14:27:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:07,266 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 11 treesize of output 3 [2021-06-05 14:27:07,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,269 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 21 treesize of output 7 [2021-06-05 14:27:07,269 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:07,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:07,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:07,297 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-05 14:27:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:07,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571189333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:07,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:07,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667995361] [2021-06-05 14:27:07,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:07,451 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) [2021-06-05 14:27:07,923 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:27:08,237 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 14:27:08,383 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-05 14:27:08,632 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 14:27:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:08,784 INFO L93 Difference]: Finished difference Result 534 states and 1626 transitions. [2021-06-05 14:27:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:08,784 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 [2021-06-05 14:27:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:08,785 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:27:08,785 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:27:08,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1404.7ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:27:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 383. [2021-06-05 14:27:08,789 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) [2021-06-05 14:27:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1232 transitions. [2021-06-05 14:27:08,790 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1232 transitions. Word has length 18 [2021-06-05 14:27:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:08,790 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1232 transitions. [2021-06-05 14:27:08,790 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) [2021-06-05 14:27:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1232 transitions. [2021-06-05 14:27:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:08,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:08,790 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:08,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6646,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:08,991 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash 216795586, now seen corresponding path program 238 times [2021-06-05 14:27:08,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:08,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049478120] [2021-06-05 14:27:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:09,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049478120] [2021-06-05 14:27:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049478120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672215222] [2021-06-05 14:27:09,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:27:09,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:09,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:09,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:09,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,274 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 [2021-06-05 14:27:09,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,278 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 [2021-06-05 14:27:09,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,281 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 15 treesize of output 11 [2021-06-05 14:27:09,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,324 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-05 14:27:09,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:09,325 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-05 14:27:09,384 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 7 treesize of output 5 [2021-06-05 14:27:09,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:09,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,392 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 18 treesize of output 14 [2021-06-05 14:27:09,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,396 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 34 treesize of output 26 [2021-06-05 14:27:09,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,400 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 [2021-06-05 14:27:09,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,405 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 25 treesize of output 19 [2021-06-05 14:27:09,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:09,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,412 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 [2021-06-05 14:27:09,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:09,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:09,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,486 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-05 14:27:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:09,488 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 21 treesize of output 7 [2021-06-05 14:27:09,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,491 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 [2021-06-05 14:27:09,492 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:09,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:09,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:09,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:09,523 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-05 14:27:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:09,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672215222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:09,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:09,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:09,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293313527] [2021-06-05 14:27:09,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:09,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:09,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:09,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:09,630 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) [2021-06-05 14:27:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:10,084 INFO L93 Difference]: Finished difference Result 534 states and 1636 transitions. [2021-06-05 14:27:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:10,084 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 [2021-06-05 14:27:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:10,085 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:27:10,085 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 14:27:10,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:27:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 14:27:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-06-05 14:27:10,089 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) [2021-06-05 14:27:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1235 transitions. [2021-06-05 14:27:10,089 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1235 transitions. Word has length 18 [2021-06-05 14:27:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:10,089 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1235 transitions. [2021-06-05 14:27:10,089 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) [2021-06-05 14:27:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1235 transitions. [2021-06-05 14:27:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:10,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:10,090 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:10,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6660,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:10,290 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1578351692, now seen corresponding path program 239 times [2021-06-05 14:27:10,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:10,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358892678] [2021-06-05 14:27:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:10,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:10,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358892678] [2021-06-05 14:27:10,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358892678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:10,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891725591] [2021-06-05 14:27:10,479 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 [2021-06-05 14:27:10,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:27:10,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:10,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:10,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,599 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 [2021-06-05 14:27:10,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,603 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 26 treesize of output 20 [2021-06-05 14:27:10,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,607 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 15 treesize of output 11 [2021-06-05 14:27:10,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:10,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,688 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.3 percent of original size [2021-06-05 14:27:10,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:10,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:103 [2021-06-05 14:27:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,759 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 16 treesize of output 12 [2021-06-05 14:27:10,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,763 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 18 treesize of output 14 [2021-06-05 14:27:10,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,838 INFO L628 ElimStorePlain]: treesize reduction 103, result has 46.6 percent of original size [2021-06-05 14:27:10,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,841 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 [2021-06-05 14:27:10,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:10,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,877 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1737 vanished before elimination [2021-06-05 14:27:10,879 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 [2021-06-05 14:27:10,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,934 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 14:27:10,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:10,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:10,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:10,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:10,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:10,972 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:27:10,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:10,973 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:56 [2021-06-05 14:27:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891725591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:11,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:11,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998562609] [2021-06-05 14:27:11,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:11,081 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) [2021-06-05 14:27:11,422 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 14:27:11,712 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 14:27:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:11,909 INFO L93 Difference]: Finished difference Result 535 states and 1633 transitions. [2021-06-05 14:27:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:27:11,909 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 [2021-06-05 14:27:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:11,910 INFO L225 Difference]: With dead ends: 535 [2021-06-05 14:27:11,910 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 14:27:11,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 862.9ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:27:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 14:27:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 382. [2021-06-05 14:27:11,914 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) [2021-06-05 14:27:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1225 transitions. [2021-06-05 14:27:11,914 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1225 transitions. Word has length 18 [2021-06-05 14:27:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:11,914 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1225 transitions. [2021-06-05 14:27:11,914 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) [2021-06-05 14:27:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1225 transitions. [2021-06-05 14:27:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:11,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:11,915 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:12,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6673 [2021-06-05 14:27:12,115 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:12,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1977028402, now seen corresponding path program 240 times [2021-06-05 14:27:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:12,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040719305] [2021-06-05 14:27:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:12,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:12,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040719305] [2021-06-05 14:27:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040719305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:12,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969357769] [2021-06-05 14:27:12,287 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 [2021-06-05 14:27:12,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:27:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:12,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:12,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,433 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 27 treesize of output 21 [2021-06-05 14:27:12,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:12,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:12,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:12,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:12,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-05 14:27:12,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,561 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 16 treesize of output 12 [2021-06-05 14:27:12,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,566 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 [2021-06-05 14:27:12,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:12,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,573 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 25 treesize of output 19 [2021-06-05 14:27:12,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,577 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 [2021-06-05 14:27:12,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,581 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 18 treesize of output 14 [2021-06-05 14:27:12,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,586 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 26 treesize of output 20 [2021-06-05 14:27:12,587 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:12,590 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,593 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 19 treesize of output 15 [2021-06-05 14:27:12,594 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:12,596 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,686 INFO L628 ElimStorePlain]: treesize reduction 108, result has 50.2 percent of original size [2021-06-05 14:27:12,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:12,689 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 11 treesize of output 3 [2021-06-05 14:27:12,690 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,692 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 21 treesize of output 7 [2021-06-05 14:27:12,693 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:12,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:12,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:12,727 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-06-05 14:27:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:12,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969357769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:12,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:12,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:12,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12881237] [2021-06-05 14:27:12,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:12,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:12,853 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) [2021-06-05 14:27:13,538 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:27:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:13,950 INFO L93 Difference]: Finished difference Result 583 states and 1787 transitions. [2021-06-05 14:27:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:13,950 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 [2021-06-05 14:27:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:13,951 INFO L225 Difference]: With dead ends: 583 [2021-06-05 14:27:13,951 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 14:27:13,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:27:13,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 14:27:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 378. [2021-06-05 14:27:13,955 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) [2021-06-05 14:27:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1212 transitions. [2021-06-05 14:27:13,955 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1212 transitions. Word has length 18 [2021-06-05 14:27:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:13,955 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1212 transitions. [2021-06-05 14:27:13,955 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) [2021-06-05 14:27:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1212 transitions. [2021-06-05 14:27:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:13,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:13,956 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:14,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6686 [2021-06-05 14:27:14,156 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1028287122, now seen corresponding path program 241 times [2021-06-05 14:27:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:14,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835687022] [2021-06-05 14:27:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:14,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:14,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835687022] [2021-06-05 14:27:14,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835687022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:14,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313470988] [2021-06-05 14:27:14,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:27:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:14,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:14,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,424 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 [2021-06-05 14:27:14,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,427 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 27 treesize of output 21 [2021-06-05 14:27:14,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:14,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,431 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 [2021-06-05 14:27:14,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,435 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 17 treesize of output 13 [2021-06-05 14:27:14,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:14,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:14,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-05 14:27:14,856 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:27:14,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,861 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 16 treesize of output 12 [2021-06-05 14:27:14,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,865 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 18 treesize of output 14 [2021-06-05 14:27:14,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,870 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 [2021-06-05 14:27:14,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,875 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 20 treesize of output 16 [2021-06-05 14:27:14,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:14,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,885 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 29 treesize of output 23 [2021-06-05 14:27:14,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,890 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 17 treesize of output 13 [2021-06-05 14:27:14,890 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:14,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:14,900 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,904 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 19 treesize of output 15 [2021-06-05 14:27:14,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:14,909 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 28 treesize of output 22 [2021-06-05 14:27:14,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:14,913 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 [2021-06-05 14:27:14,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,063 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:27:15,063 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-06-05 14:27:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:15,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:15,072 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 9 treesize of output 3 [2021-06-05 14:27:15,073 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:15,076 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 21 treesize of output 7 [2021-06-05 14:27:15,077 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:15,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:15,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:27:15,141 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-06-05 14:27:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:15,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313470988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:15,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:15,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:15,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387349598] [2021-06-05 14:27:15,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:15,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:15,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:15,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:15,231 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) [2021-06-05 14:27:15,620 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 14:27:15,934 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-05 14:27:16,341 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2021-06-05 14:27:16,773 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 108 [2021-06-05 14:27:17,111 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 88 [2021-06-05 14:27:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:17,176 INFO L93 Difference]: Finished difference Result 583 states and 1754 transitions. [2021-06-05 14:27:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:17,177 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 [2021-06-05 14:27:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:17,178 INFO L225 Difference]: With dead ends: 583 [2021-06-05 14:27:17,178 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:27:17,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2127.5ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:27:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:27:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 383. [2021-06-05 14:27:17,182 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) [2021-06-05 14:27:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1222 transitions. [2021-06-05 14:27:17,182 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1222 transitions. Word has length 18 [2021-06-05 14:27:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:17,182 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1222 transitions. [2021-06-05 14:27:17,182 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) [2021-06-05 14:27:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1222 transitions. [2021-06-05 14:27:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:17,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:17,183 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:17,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6701,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:17,383 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash -102263678, now seen corresponding path program 242 times [2021-06-05 14:27:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:17,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972145181] [2021-06-05 14:27:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:17,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:17,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972145181] [2021-06-05 14:27:17,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972145181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:17,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727023745] [2021-06-05 14:27:17,544 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 [2021-06-05 14:27:17,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,646 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 [2021-06-05 14:27:17,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,649 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 16 treesize of output 12 [2021-06-05 14:27:17,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:17,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,657 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 24 treesize of output 18 [2021-06-05 14:27:17,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,660 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 [2021-06-05 14:27:17,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:17,663 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 15 treesize of output 11 [2021-06-05 14:27:17,664 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:17,726 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:27:17,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:17,727 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:27:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:18,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:18,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,083 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-05 14:27:18,084 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:27:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:27:18,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,110 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-06-05 14:27:18,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:18,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:18,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,142 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 [2021-06-05 14:27:18,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:18,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:27:18,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:18,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:18,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:18,179 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:27:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:18,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727023745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:18,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:18,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:18,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458704177] [2021-06-05 14:27:18,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:18,242 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) [2021-06-05 14:27:18,644 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 14:27:18,879 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-05 14:27:19,068 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-06-05 14:27:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:19,185 INFO L93 Difference]: Finished difference Result 577 states and 1743 transitions. [2021-06-05 14:27:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:19,185 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 [2021-06-05 14:27:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:19,186 INFO L225 Difference]: With dead ends: 577 [2021-06-05 14:27:19,186 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 14:27:19,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1095.3ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 14:27:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 377. [2021-06-05 14:27:19,190 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) [2021-06-05 14:27:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-06-05 14:27:19,190 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-06-05 14:27:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:19,190 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-06-05 14:27:19,190 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) [2021-06-05 14:27:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-06-05 14:27:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:19,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:19,191 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:19,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6719 [2021-06-05 14:27:19,391 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -360500806, now seen corresponding path program 243 times [2021-06-05 14:27:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:19,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523531865] [2021-06-05 14:27:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:19,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523531865] [2021-06-05 14:27:19,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523531865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:19,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541199423] [2021-06-05 14:27:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:27:19,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:27:19,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,620 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 16 treesize of output 12 [2021-06-05 14:27:19,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,623 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 [2021-06-05 14:27:19,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,627 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 [2021-06-05 14:27:19,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,630 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 [2021-06-05 14:27:19,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,666 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-05 14:27:19,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:19,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-05 14:27:19,835 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:27:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,839 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 15 treesize of output 11 [2021-06-05 14:27:19,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,843 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 [2021-06-05 14:27:19,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:19,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:19,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,854 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 [2021-06-05 14:27:19,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:19,859 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 34 treesize of output 26 [2021-06-05 14:27:19,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,933 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-05 14:27:19,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:19,937 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:19,939 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 [2021-06-05 14:27:19,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:19,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:19,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:19,969 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:27:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:20,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541199423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:20,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:20,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:20,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500124552] [2021-06-05 14:27:20,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:20,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:20,027 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) [2021-06-05 14:27:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:20,476 INFO L93 Difference]: Finished difference Result 593 states and 1811 transitions. [2021-06-05 14:27:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:20,477 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 [2021-06-05 14:27:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:20,477 INFO L225 Difference]: With dead ends: 593 [2021-06-05 14:27:20,478 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:27:20,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 534.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:27:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 377. [2021-06-05 14:27:20,482 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) [2021-06-05 14:27:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-06-05 14:27:20,482 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-06-05 14:27:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:20,482 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-06-05 14:27:20,482 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) [2021-06-05 14:27:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-06-05 14:27:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:20,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:20,483 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:20,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6744,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:20,683 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2085617846, now seen corresponding path program 244 times [2021-06-05 14:27:20,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:20,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794995251] [2021-06-05 14:27:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:20,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:20,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794995251] [2021-06-05 14:27:20,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794995251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:20,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639587236] [2021-06-05 14:27:20,865 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 [2021-06-05 14:27:20,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:20,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:20,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:20,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,980 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 [2021-06-05 14:27:20,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,983 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 27 treesize of output 21 [2021-06-05 14:27:20,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:20,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:20,990 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 17 treesize of output 13 [2021-06-05 14:27:20,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:21,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:21,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-05 14:27:21,394 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:27:21,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,399 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 16 treesize of output 12 [2021-06-05 14:27:21,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,404 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 18 treesize of output 14 [2021-06-05 14:27:21,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,409 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 19 treesize of output 15 [2021-06-05 14:27:21,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,413 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 25 treesize of output 19 [2021-06-05 14:27:21,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:27:21,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,423 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 26 treesize of output 20 [2021-06-05 14:27:21,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,428 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 17 treesize of output 13 [2021-06-05 14:27:21,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,433 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 15 treesize of output 11 [2021-06-05 14:27:21,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,438 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 [2021-06-05 14:27:21,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,442 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 [2021-06-05 14:27:21,443 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,447 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 28 treesize of output 22 [2021-06-05 14:27:21,448 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,451 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 20 treesize of output 16 [2021-06-05 14:27:21,452 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,601 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:27:21,601 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-06-05 14:27:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,605 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 11 treesize of output 3 [2021-06-05 14:27:21,606 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,610 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 9 treesize of output 3 [2021-06-05 14:27:21,610 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:21,614 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 [2021-06-05 14:27:21,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:21,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:21,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:27:21,677 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-06-05 14:27:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639587236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:21,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:21,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:21,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611229250] [2021-06-05 14:27:21,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:21,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:21,771 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) [2021-06-05 14:27:22,382 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-05 14:27:22,690 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 97 [2021-06-05 14:27:22,923 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 14:27:23,096 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 14:27:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:23,158 INFO L93 Difference]: Finished difference Result 576 states and 1752 transitions. [2021-06-05 14:27:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:27:23,159 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 [2021-06-05 14:27:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:23,160 INFO L225 Difference]: With dead ends: 576 [2021-06-05 14:27:23,160 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:27:23,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1543.8ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:27:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:27:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 380. [2021-06-05 14:27:23,163 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) [2021-06-05 14:27:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-06-05 14:27:23,164 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-06-05 14:27:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:23,164 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-06-05 14:27:23,164 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) [2021-06-05 14:27:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-06-05 14:27:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:23,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:23,165 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:23,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6757,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:23,365 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1159594402, now seen corresponding path program 245 times [2021-06-05 14:27:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:23,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173726146] [2021-06-05 14:27:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:23,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173726146] [2021-06-05 14:27:23,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173726146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334912821] [2021-06-05 14:27:23,575 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 [2021-06-05 14:27:23,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:23,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:23,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,674 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 25 treesize of output 19 [2021-06-05 14:27:23,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:23,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,681 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 26 treesize of output 20 [2021-06-05 14:27:23,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:27:23,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:23,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:23,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:23,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:23,757 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:27:23,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:23,758 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:27:24,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:24,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:24,050 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 25 treesize of output 19 [2021-06-05 14:27:24,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:24,055 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 15 treesize of output 11 [2021-06-05 14:27:24,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:24,129 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-05 14:27:24,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:24,132 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 [2021-06-05 14:27:24,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:24,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:24,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1770 vanished before elimination [2021-06-05 14:27:24,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:24,163 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 10 treesize of output 5 [2021-06-05 14:27:24,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:24,166 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 20 treesize of output 9 [2021-06-05 14:27:24,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:24,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:24,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:24,201 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 7 treesize of output 5 [2021-06-05 14:27:24,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:24,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:24,226 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1771 vanished before elimination [2021-06-05 14:27:24,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:24,227 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-05 14:27:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334912821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:24,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:24,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872149652] [2021-06-05 14:27:24,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:24,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:24,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:24,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:24,289 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) [2021-06-05 14:27:24,850 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 14:27:25,010 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 14:27:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:25,114 INFO L93 Difference]: Finished difference Result 546 states and 1667 transitions. [2021-06-05 14:27:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:25,114 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 [2021-06-05 14:27:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:25,115 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:27:25,115 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:27:25,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:27:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-06-05 14:27:25,119 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) [2021-06-05 14:27:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-06-05 14:27:25,120 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-06-05 14:27:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:25,120 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-06-05 14:27:25,120 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) [2021-06-05 14:27:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-06-05 14:27:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:25,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:25,120 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:25,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6775,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:25,321 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 914447872, now seen corresponding path program 246 times [2021-06-05 14:27:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525456234] [2021-06-05 14:27:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:25,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525456234] [2021-06-05 14:27:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525456234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248515364] [2021-06-05 14:27:25,485 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 [2021-06-05 14:27:25,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:27:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:25,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:25,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,575 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 [2021-06-05 14:27:25,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:25,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:25,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,617 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-05 14:27:25,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:25,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-05 14:27:25,785 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:27:25,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,789 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 34 treesize of output 26 [2021-06-05 14:27:25,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:25,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:25,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,801 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 35 treesize of output 27 [2021-06-05 14:27:25,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:25,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:25,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,809 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 25 treesize of output 19 [2021-06-05 14:27:25,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,884 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-05 14:27:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,887 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 21 treesize of output 7 [2021-06-05 14:27:25,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:25,890 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 [2021-06-05 14:27:25,891 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:25,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:25,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:25,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:25,920 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-05 14:27:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248515364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:25,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:25,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:25,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127339575] [2021-06-05 14:27:25,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:25,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:25,979 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) [2021-06-05 14:27:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:26,496 INFO L93 Difference]: Finished difference Result 552 states and 1691 transitions. [2021-06-05 14:27:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:26,497 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 [2021-06-05 14:27:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:26,498 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:27:26,498 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:27:26,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:27:26,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 376. [2021-06-05 14:27:26,501 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) [2021-06-05 14:27:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-06-05 14:27:26,502 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-06-05 14:27:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:26,502 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-06-05 14:27:26,502 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) [2021-06-05 14:27:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-06-05 14:27:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:26,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:26,503 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6800,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:26,703 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1149555154, now seen corresponding path program 247 times [2021-06-05 14:27:26,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:26,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578891634] [2021-06-05 14:27:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:26,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:26,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578891634] [2021-06-05 14:27:26,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578891634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:26,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142764949] [2021-06-05 14:27:26,898 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 [2021-06-05 14:27:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:26,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:27,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:27,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,009 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 27 treesize of output 21 [2021-06-05 14:27:27,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,013 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 15 treesize of output 11 [2021-06-05 14:27:27,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:27,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:27,050 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-05 14:27:27,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,175 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 29 treesize of output 23 [2021-06-05 14:27:27,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,180 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 17 treesize of output 13 [2021-06-05 14:27:27,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,184 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 19 treesize of output 15 [2021-06-05 14:27:27,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,188 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 28 treesize of output 22 [2021-06-05 14:27:27,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:27,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:27,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:27,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,202 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 18 treesize of output 14 [2021-06-05 14:27:27,203 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,207 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 15 treesize of output 11 [2021-06-05 14:27:27,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:27,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,280 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-05 14:27:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:27,283 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 11 treesize of output 3 [2021-06-05 14:27:27,284 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:27,287 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:27,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:27,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:27,315 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-05 14:27:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:27,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142764949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:27,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:27,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:27:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752031472] [2021-06-05 14:27:27,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:27:27,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:27:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:27,434 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) [2021-06-05 14:27:28,055 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-06-05 14:27:28,253 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 14:27:28,472 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-06-05 14:27:28,634 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-05 14:27:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:28,685 INFO L93 Difference]: Finished difference Result 590 states and 1792 transitions. [2021-06-05 14:27:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:27:28,686 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 [2021-06-05 14:27:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:28,686 INFO L225 Difference]: With dead ends: 590 [2021-06-05 14:27:28,686 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 14:27:28,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1303.0ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 14:27:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 377. [2021-06-05 14:27:28,690 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) [2021-06-05 14:27:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1203 transitions. [2021-06-05 14:27:28,691 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1203 transitions. Word has length 18 [2021-06-05 14:27:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:28,691 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1203 transitions. [2021-06-05 14:27:28,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:27:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1203 transitions. [2021-06-05 14:27:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:28,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:28,691 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:28,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6813 [2021-06-05 14:27:28,892 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -223531710, now seen corresponding path program 248 times [2021-06-05 14:27:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:28,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539964785] [2021-06-05 14:27:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:29,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539964785] [2021-06-05 14:27:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539964785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535858194] [2021-06-05 14:27:29,097 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 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 [2021-06-05 14:27:29,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:29,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:29,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,198 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 16 treesize of output 12 [2021-06-05 14:27:29,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,202 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 26 treesize of output 20 [2021-06-05 14:27:29,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,206 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 24 treesize of output 18 [2021-06-05 14:27:29,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,209 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 25 treesize of output 19 [2021-06-05 14:27:29,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:29,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,276 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:27:29,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:29,277 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:27:29,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:29,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,393 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 16 treesize of output 12 [2021-06-05 14:27:29,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,397 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 25 treesize of output 19 [2021-06-05 14:27:29,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,401 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 [2021-06-05 14:27:29,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,405 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 26 treesize of output 20 [2021-06-05 14:27:29,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,409 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 15 treesize of output 11 [2021-06-05 14:27:29,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,413 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 [2021-06-05 14:27:29,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:29,484 INFO L628 ElimStorePlain]: treesize reduction 196, result has 29.2 percent of original size [2021-06-05 14:27:29,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:29,487 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 [2021-06-05 14:27:29,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,489 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 [2021-06-05 14:27:29,490 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:29,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:29,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:29,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:29,522 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:59 [2021-06-05 14:27:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:29,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535858194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:29,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:29,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:29,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39756231] [2021-06-05 14:27:29,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:29,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:29,658 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) [2021-06-05 14:27:30,115 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-06-05 14:27:30,316 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-05 14:27:30,568 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 14:27:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:30,693 INFO L93 Difference]: Finished difference Result 546 states and 1664 transitions. [2021-06-05 14:27:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:30,693 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 [2021-06-05 14:27:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:30,694 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:27:30,694 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 14:27:30,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 14:27:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 375. [2021-06-05 14:27:30,698 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) [2021-06-05 14:27:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-06-05 14:27:30,699 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-06-05 14:27:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:30,699 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-06-05 14:27:30,699 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) [2021-06-05 14:27:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-06-05 14:27:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:30,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:30,699 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6828,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:30,900 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1257031384, now seen corresponding path program 249 times [2021-06-05 14:27:30,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:30,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259015362] [2021-06-05 14:27:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:31,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259015362] [2021-06-05 14:27:31,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259015362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178050166] [2021-06-05 14:27:31,104 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 [2021-06-05 14:27:31,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:27:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:31,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,195 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 16 treesize of output 12 [2021-06-05 14:27:31,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,199 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 [2021-06-05 14:27:31,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,202 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 26 treesize of output 20 [2021-06-05 14:27:31,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:31,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,241 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-05 14:27:31,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:31,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-05 14:27:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:27:31,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,320 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 [2021-06-05 14:27:31,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:27:31,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,328 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 34 treesize of output 26 [2021-06-05 14:27:31,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:31,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:31,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:31,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,343 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 35 treesize of output 27 [2021-06-05 14:27:31,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:31,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:31,348 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,415 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-05 14:27:31,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:31,418 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 [2021-06-05 14:27:31,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,421 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 [2021-06-05 14:27:31,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:31,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:31,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:31,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:31,453 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-05 14:27:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:31,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178050166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:31,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:31,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:31,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021138701] [2021-06-05 14:27:31,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:31,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:31,558 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) [2021-06-05 14:27:32,008 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-06-05 14:27:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:32,158 INFO L93 Difference]: Finished difference Result 559 states and 1694 transitions. [2021-06-05 14:27:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:32,159 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 [2021-06-05 14:27:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:32,159 INFO L225 Difference]: With dead ends: 559 [2021-06-05 14:27:32,159 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:27:32,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:32,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:27:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 375. [2021-06-05 14:27:32,163 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) [2021-06-05 14:27:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-06-05 14:27:32,164 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-06-05 14:27:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:32,164 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-06-05 14:27:32,164 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) [2021-06-05 14:27:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-06-05 14:27:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:32,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:32,164 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:32,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6843 [2021-06-05 14:27:32,365 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379806, now seen corresponding path program 250 times [2021-06-05 14:27:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:32,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248172578] [2021-06-05 14:27:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:32,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:32,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248172578] [2021-06-05 14:27:32,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248172578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:32,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894110077] [2021-06-05 14:27:32,589 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 [2021-06-05 14:27:32,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:32,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,677 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 16 treesize of output 12 [2021-06-05 14:27:32,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:32,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,683 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 26 treesize of output 20 [2021-06-05 14:27:32,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,687 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 25 treesize of output 19 [2021-06-05 14:27:32,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,722 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-05 14:27:32,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:32,723 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-05 14:27:32,797 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 7 treesize of output 5 [2021-06-05 14:27:32,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,801 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 15 treesize of output 11 [2021-06-05 14:27:32,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:27:32,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,809 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 34 treesize of output 26 [2021-06-05 14:27:32,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,813 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 25 treesize of output 19 [2021-06-05 14:27:32,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:32,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:32,822 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,825 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 35 treesize of output 27 [2021-06-05 14:27:32,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:32,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:32,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,897 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-05 14:27:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:32,900 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 [2021-06-05 14:27:32,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,902 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 21 treesize of output 7 [2021-06-05 14:27:32,903 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:32,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:32,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:32,934 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-05 14:27:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:33,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894110077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:33,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:33,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973180506] [2021-06-05 14:27:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:33,042 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) [2021-06-05 14:27:33,572 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 14:27:33,804 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-06-05 14:27:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:33,867 INFO L93 Difference]: Finished difference Result 542 states and 1651 transitions. [2021-06-05 14:27:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:33,867 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 [2021-06-05 14:27:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:33,868 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:27:33,868 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:27:33,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:27:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:27:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 375. [2021-06-05 14:27:33,872 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) [2021-06-05 14:27:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-06-05 14:27:33,872 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-06-05 14:27:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:33,872 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-06-05 14:27:33,872 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) [2021-06-05 14:27:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-06-05 14:27:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:33,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:33,873 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:34,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6856,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:34,073 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:34,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1815558674, now seen corresponding path program 251 times [2021-06-05 14:27:34,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:34,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335781853] [2021-06-05 14:27:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:34,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335781853] [2021-06-05 14:27:34,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335781853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025627603] [2021-06-05 14:27:34,284 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 [2021-06-05 14:27:34,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:27:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,406 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 34 treesize of output 26 [2021-06-05 14:27:34,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,411 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 [2021-06-05 14:27:34,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,415 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 [2021-06-05 14:27:34,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,419 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 35 treesize of output 27 [2021-06-05 14:27:34,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:34,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,424 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 [2021-06-05 14:27:34,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,428 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 24 treesize of output 18 [2021-06-05 14:27:34,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,557 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 14:27:34,557 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.6 percent of original size [2021-06-05 14:27:34,578 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. [2021-06-05 14:27:34,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-06-05 14:27:34,869 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 14:27:34,954 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-05 14:27:34,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,959 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 29 treesize of output 23 [2021-06-05 14:27:34,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,965 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 26 treesize of output 20 [2021-06-05 14:27:34,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,971 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 25 treesize of output 19 [2021-06-05 14:27:34,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,976 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 [2021-06-05 14:27:34,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,982 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 28 treesize of output 22 [2021-06-05 14:27:34,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,988 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 26 treesize of output 20 [2021-06-05 14:27:34,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,993 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 16 treesize of output 12 [2021-06-05 14:27:34,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:34,999 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 [2021-06-05 14:27:34,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,004 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 47 treesize of output 37 [2021-06-05 14:27:35,005 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,011 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 28 treesize of output 22 [2021-06-05 14:27:35,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:35,017 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,022 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 46 treesize of output 36 [2021-06-05 14:27:35,023 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,028 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 25 treesize of output 19 [2021-06-05 14:27:35,029 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,033 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 29 treesize of output 23 [2021-06-05 14:27:35,034 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:35,249 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-06-05 14:27:35,249 INFO L628 ElimStorePlain]: treesize reduction 256, result has 43.4 percent of original size [2021-06-05 14:27:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:35,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:35,258 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:35,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:35,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 14:27:35,344 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:655, output treesize:120 [2021-06-05 14:27:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025627603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:35,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:35,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:35,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177324154] [2021-06-05 14:27:35,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:35,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:35,489 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) [2021-06-05 14:27:35,857 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-05 14:27:36,228 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-06-05 14:27:36,572 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2021-06-05 14:27:36,956 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2021-06-05 14:27:37,162 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-05 14:27:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:37,212 INFO L93 Difference]: Finished difference Result 551 states and 1677 transitions. [2021-06-05 14:27:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:27:37,213 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 [2021-06-05 14:27:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:37,213 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:27:37,213 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 14:27:37,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1879.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 14:27:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 375. [2021-06-05 14:27:37,217 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) [2021-06-05 14:27:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-06-05 14:27:37,218 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-06-05 14:27:37,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:37,218 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-06-05 14:27:37,218 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) [2021-06-05 14:27:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-06-05 14:27:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:37,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:37,218 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:37,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6869,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:37,419 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash -997760802, now seen corresponding path program 252 times [2021-06-05 14:27:37,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:37,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608372262] [2021-06-05 14:27:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:37,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608372262] [2021-06-05 14:27:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608372262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268727404] [2021-06-05 14:27:37,644 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 [2021-06-05 14:27:37,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:27:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:37,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,743 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 24 treesize of output 18 [2021-06-05 14:27:37,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,747 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 16 treesize of output 12 [2021-06-05 14:27:37,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,751 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 25 treesize of output 19 [2021-06-05 14:27:37,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,755 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 15 treesize of output 11 [2021-06-05 14:27:37,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,758 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 [2021-06-05 14:27:37,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,762 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 26 treesize of output 20 [2021-06-05 14:27:37,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,838 INFO L628 ElimStorePlain]: treesize reduction 62, result has 62.0 percent of original size [2021-06-05 14:27:37,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:37,839 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:235, output treesize:101 [2021-06-05 14:27:37,986 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 18 treesize of output 14 [2021-06-05 14:27:37,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:37,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,995 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 26 treesize of output 20 [2021-06-05 14:27:37,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:37,999 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 35 treesize of output 27 [2021-06-05 14:27:38,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:38,077 INFO L628 ElimStorePlain]: treesize reduction 216, result has 29.4 percent of original size [2021-06-05 14:27:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:38,080 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 20 treesize of output 9 [2021-06-05 14:27:38,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,098 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 [2021-06-05 14:27:38,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,139 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 7 treesize of output 5 [2021-06-05 14:27:38,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:38,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:38,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1782 vanished before elimination [2021-06-05 14:27:38,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:38,165 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:278, output treesize:61 [2021-06-05 14:27:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:38,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268727404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:38,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:38,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:38,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087418231] [2021-06-05 14:27:38,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:38,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:38,286 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) [2021-06-05 14:27:38,624 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 14:27:38,838 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-06-05 14:27:39,083 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 14:27:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:39,364 INFO L93 Difference]: Finished difference Result 554 states and 1688 transitions. [2021-06-05 14:27:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:39,365 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 [2021-06-05 14:27:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:39,366 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:27:39,366 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:27:39,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1207.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:27:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:27:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 374. [2021-06-05 14:27:39,369 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) [2021-06-05 14:27:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-06-05 14:27:39,370 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-06-05 14:27:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:39,370 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-06-05 14:27:39,370 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) [2021-06-05 14:27:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-06-05 14:27:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:39,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:39,371 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:39,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6886,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:39,571 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:39,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1277703096, now seen corresponding path program 253 times [2021-06-05 14:27:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:39,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455711711] [2021-06-05 14:27:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:39,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455711711] [2021-06-05 14:27:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455711711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259469867] [2021-06-05 14:27:39,725 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 [2021-06-05 14:27:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:39,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:39,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:39,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:39,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,850 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 34 treesize of output 26 [2021-06-05 14:27:39,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:39,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:39,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,858 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 35 treesize of output 27 [2021-06-05 14:27:39,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:27:39,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:39,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:39,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:39,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:27:39,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,014 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 14:27:40,015 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.6 percent of original size [2021-06-05 14:27:40,021 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. [2021-06-05 14:27:40,021 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-06-05 14:27:40,310 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 14:27:40,531 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-05 14:27:40,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,535 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 28 treesize of output 22 [2021-06-05 14:27:40,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:40,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:40,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,551 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 29 treesize of output 23 [2021-06-05 14:27:40,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,557 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 16 treesize of output 12 [2021-06-05 14:27:40,557 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,562 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 16 treesize of output 12 [2021-06-05 14:27:40,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,567 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 28 treesize of output 22 [2021-06-05 14:27:40,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:40,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,578 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 [2021-06-05 14:27:40,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,583 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 [2021-06-05 14:27:40,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 14:27:40,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:40,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,593 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 29 treesize of output 23 [2021-06-05 14:27:40,594 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,599 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 15 treesize of output 11 [2021-06-05 14:27:40,600 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,604 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 28 treesize of output 22 [2021-06-05 14:27:40,605 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,751 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-06-05 14:27:40,751 INFO L628 ElimStorePlain]: treesize reduction 182, result has 45.7 percent of original size [2021-06-05 14:27:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:40,756 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:40,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:40,760 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:40,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:40,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:27:40,816 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:499, output treesize:56 [2021-06-05 14:27:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:40,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259469867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:40,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:40,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:40,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961259376] [2021-06-05 14:27:40,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:40,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:40,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:40,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:40,903 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) [2021-06-05 14:27:41,452 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-06-05 14:27:41,826 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 118 [2021-06-05 14:27:42,046 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2021-06-05 14:27:42,191 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 14:27:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:42,243 INFO L93 Difference]: Finished difference Result 538 states and 1636 transitions. [2021-06-05 14:27:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:42,243 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 [2021-06-05 14:27:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:42,244 INFO L225 Difference]: With dead ends: 538 [2021-06-05 14:27:42,244 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 14:27:42,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1507.3ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:27:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 14:27:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 374. [2021-06-05 14:27:42,247 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) [2021-06-05 14:27:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-06-05 14:27:42,248 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-06-05 14:27:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:42,248 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-06-05 14:27:42,248 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) [2021-06-05 14:27:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-06-05 14:27:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:42,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:42,249 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:42,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6904,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:42,449 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash 910480080, now seen corresponding path program 254 times [2021-06-05 14:27:42,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:42,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409376674] [2021-06-05 14:27:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:42,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:42,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409376674] [2021-06-05 14:27:42,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409376674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:42,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627179072] [2021-06-05 14:27:42,627 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 [2021-06-05 14:27:42,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:42,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:42,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,732 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 [2021-06-05 14:27:42,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,736 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 [2021-06-05 14:27:42,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,740 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 17 treesize of output 13 [2021-06-05 14:27:42,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,743 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 27 treesize of output 21 [2021-06-05 14:27:42,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:42,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:42,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:42,777 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-06-05 14:27:42,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,902 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 29 treesize of output 23 [2021-06-05 14:27:42,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,907 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 15 treesize of output 11 [2021-06-05 14:27:42,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,911 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 19 treesize of output 15 [2021-06-05 14:27:42,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,915 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 28 treesize of output 22 [2021-06-05 14:27:42,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:42,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,922 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 [2021-06-05 14:27:42,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:42,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:42,930 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 18 treesize of output 14 [2021-06-05 14:27:42,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:42,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:42,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:42,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:43,002 INFO L628 ElimStorePlain]: treesize reduction 61, result has 58.5 percent of original size [2021-06-05 14:27:43,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:43,005 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 11 treesize of output 3 [2021-06-05 14:27:43,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:43,007 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 [2021-06-05 14:27:43,008 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:43,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:43,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:43,036 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:359, output treesize:64 [2021-06-05 14:27:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:43,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627179072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:43,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:43,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:27:43,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529273275] [2021-06-05 14:27:43,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:43,154 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) [2021-06-05 14:27:43,549 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 14:27:43,723 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 14:27:43,871 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 14:27:44,083 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 14:27:44,234 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 14:27:44,440 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 14:27:44,632 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 14:27:44,863 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2021-06-05 14:27:45,057 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:27:45,252 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 14:27:45,470 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 14:27:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:45,535 INFO L93 Difference]: Finished difference Result 564 states and 1708 transitions. [2021-06-05 14:27:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:27:45,535 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 [2021-06-05 14:27:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:45,536 INFO L225 Difference]: With dead ends: 564 [2021-06-05 14:27:45,536 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 14:27:45,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2303.7ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:27:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 14:27:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 372. [2021-06-05 14:27:45,540 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) [2021-06-05 14:27:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1187 transitions. [2021-06-05 14:27:45,540 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1187 transitions. Word has length 18 [2021-06-05 14:27:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:45,540 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1187 transitions. [2021-06-05 14:27:45,540 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) [2021-06-05 14:27:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1187 transitions. [2021-06-05 14:27:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:45,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:45,541 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:45,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6930,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:45,741 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 903035708, now seen corresponding path program 255 times [2021-06-05 14:27:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:45,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689031521] [2021-06-05 14:27:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:45,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:45,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689031521] [2021-06-05 14:27:45,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689031521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:45,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970783086] [2021-06-05 14:27:45,852 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 [2021-06-05 14:27:45,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:27:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:45,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:45,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:45,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:45,985 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 16 treesize of output 12 [2021-06-05 14:27:45,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:45,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:45,990 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 26 treesize of output 20 [2021-06-05 14:27:45,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:45,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:45,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:45,996 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 15 treesize of output 11 [2021-06-05 14:27:45,997 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,049 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 14:27:46,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:46,050 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-05 14:27:46,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,187 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 25 treesize of output 19 [2021-06-05 14:27:46,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,189 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 27 treesize of output 21 [2021-06-05 14:27:46,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:46,211 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:27:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:46,213 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 21 treesize of output 7 [2021-06-05 14:27:46,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:46,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:46,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:46,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:27:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:46,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970783086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:46,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:46,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:27:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187980610] [2021-06-05 14:27:46,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:46,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:46,241 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) [2021-06-05 14:27:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:46,599 INFO L93 Difference]: Finished difference Result 484 states and 1467 transitions. [2021-06-05 14:27:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:46,600 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 [2021-06-05 14:27:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:46,600 INFO L225 Difference]: With dead ends: 484 [2021-06-05 14:27:46,600 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 14:27:46,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 14:27:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 380. [2021-06-05 14:27:46,604 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) [2021-06-05 14:27:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-06-05 14:27:46,605 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-06-05 14:27:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:46,605 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-06-05 14:27:46,605 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) [2021-06-05 14:27:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-06-05 14:27:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:46,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:46,605 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:46,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6944,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:46,806 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 858781830, now seen corresponding path program 256 times [2021-06-05 14:27:46,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:46,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673800467] [2021-06-05 14:27:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:46,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:46,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673800467] [2021-06-05 14:27:46,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673800467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:46,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229607245] [2021-06-05 14:27:46,961 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 [2021-06-05 14:27:46,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:46,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:46,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:47,122 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 19 treesize of output 15 [2021-06-05 14:27:47,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,125 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 15 treesize of output 11 [2021-06-05 14:27:47,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:47,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:47,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:47,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:47,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:47,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:47,146 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:47,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,152 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 25 treesize of output 19 [2021-06-05 14:27:47,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:47,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:47,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,235 INFO L628 ElimStorePlain]: treesize reduction 121, result has 51.2 percent of original size [2021-06-05 14:27:47,240 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. [2021-06-05 14:27:47,240 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:287, output treesize:127 [2021-06-05 14:27:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,541 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 [2021-06-05 14:27:47,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,547 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 15 treesize of output 11 [2021-06-05 14:27:47,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,552 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 19 treesize of output 15 [2021-06-05 14:27:47,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:47,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,563 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 18 treesize of output 14 [2021-06-05 14:27:47,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,568 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 16 treesize of output 12 [2021-06-05 14:27:47,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,574 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 [2021-06-05 14:27:47,574 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,579 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 [2021-06-05 14:27:47,579 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,584 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 [2021-06-05 14:27:47,585 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,589 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 [2021-06-05 14:27:47,590 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,595 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 27 treesize of output 21 [2021-06-05 14:27:47,596 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,599 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 26 treesize of output 20 [2021-06-05 14:27:47,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,730 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 14:27:47,730 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-06-05 14:27:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:27:47,735 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:27:47,739 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:47,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:47,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:27:47,791 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-06-05 14:27:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:47,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229607245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:47,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:47,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:27:47,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016228377] [2021-06-05 14:27:47,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:47,873 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) [2021-06-05 14:27:48,754 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-05 14:27:49,088 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 104 [2021-06-05 14:27:49,248 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-05 14:27:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:49,600 INFO L93 Difference]: Finished difference Result 612 states and 1826 transitions. [2021-06-05 14:27:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:27:49,600 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 [2021-06-05 14:27:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:49,601 INFO L225 Difference]: With dead ends: 612 [2021-06-05 14:27:49,601 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 14:27:49,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1612.4ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:27:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 14:27:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 406. [2021-06-05 14:27:49,605 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) [2021-06-05 14:27:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2021-06-05 14:27:49,606 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 18 [2021-06-05 14:27:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2021-06-05 14:27:49,606 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) [2021-06-05 14:27:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2021-06-05 14:27:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:49,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:49,606 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:49,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6958 [2021-06-05 14:27:49,807 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:49,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1046030646, now seen corresponding path program 257 times [2021-06-05 14:27:49,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:49,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952461770] [2021-06-05 14:27:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:49,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:49,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952461770] [2021-06-05 14:27:49,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952461770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:49,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987243105] [2021-06-05 14:27:49,915 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 [2021-06-05 14:27:49,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:50,043 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 16 treesize of output 12 [2021-06-05 14:27:50,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:27:50,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:50,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,052 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 26 treesize of output 20 [2021-06-05 14:27:50,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,055 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 [2021-06-05 14:27:50,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:50,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,105 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 14:27:50,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:50,106 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-05 14:27:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,248 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 27 treesize of output 21 [2021-06-05 14:27:50,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:50,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,251 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 [2021-06-05 14:27:50,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,273 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:27:50,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:50,274 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 21 treesize of output 7 [2021-06-05 14:27:50,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:50,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:50,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:27:50,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:27:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:50,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987243105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:50,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:50,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:27:50,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91064040] [2021-06-05 14:27:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:50,302 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) [2021-06-05 14:27:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:50,654 INFO L93 Difference]: Finished difference Result 487 states and 1493 transitions. [2021-06-05 14:27:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:50,654 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 [2021-06-05 14:27:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:50,655 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:27:50,655 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:27:50,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:27:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:27:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 408. [2021-06-05 14:27:50,659 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) [2021-06-05 14:27:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2021-06-05 14:27:50,660 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 18 [2021-06-05 14:27:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:50,660 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2021-06-05 14:27:50,660 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) [2021-06-05 14:27:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2021-06-05 14:27:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:50,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:50,660 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:50,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7012,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:50,861 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash 435207224, now seen corresponding path program 258 times [2021-06-05 14:27:50,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:50,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81202465] [2021-06-05 14:27:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:50,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:50,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81202465] [2021-06-05 14:27:50,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81202465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:50,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578396963] [2021-06-05 14:27:50,994 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 [2021-06-05 14:27:51,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:27:51,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:51,124 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 16 treesize of output 12 [2021-06-05 14:27:51,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,127 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 16 treesize of output 12 [2021-06-05 14:27:51,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,130 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 15 treesize of output 11 [2021-06-05 14:27:51,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:51,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:51,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,138 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 15 treesize of output 11 [2021-06-05 14:27:51,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,186 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-05 14:27:51,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:51,187 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-05 14:27:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,276 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 25 treesize of output 19 [2021-06-05 14:27:51,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,279 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 27 treesize of output 21 [2021-06-05 14:27:51,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:51,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:51,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:51,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:51,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:51,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:51,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,348 INFO L628 ElimStorePlain]: treesize reduction 57, result has 56.8 percent of original size [2021-06-05 14:27:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:51,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:51,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:51,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:51,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:51,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:51,383 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:194, output treesize:53 [2021-06-05 14:27:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578396963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:51,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:51,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:27:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122664020] [2021-06-05 14:27:51,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:51,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:51,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:51,446 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) [2021-06-05 14:27:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:51,913 INFO L93 Difference]: Finished difference Result 486 states and 1491 transitions. [2021-06-05 14:27:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:51,913 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 [2021-06-05 14:27:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:51,914 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:27:51,914 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 14:27:51,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:27:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 14:27:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 403. [2021-06-05 14:27:51,919 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) [2021-06-05 14:27:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1276 transitions. [2021-06-05 14:27:51,920 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1276 transitions. Word has length 18 [2021-06-05 14:27:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:51,920 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1276 transitions. [2021-06-05 14:27:51,920 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) [2021-06-05 14:27:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1276 transitions. [2021-06-05 14:27:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:51,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:51,921 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7026 [2021-06-05 14:27:52,137 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2119116026, now seen corresponding path program 259 times [2021-06-05 14:27:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925648776] [2021-06-05 14:27:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:52,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925648776] [2021-06-05 14:27:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925648776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301346448] [2021-06-05 14:27:52,347 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 [2021-06-05 14:27:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:52,509 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 15 treesize of output 11 [2021-06-05 14:27:52,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,512 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 16 treesize of output 12 [2021-06-05 14:27:52,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:27:52,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:27:52,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:52,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:52,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,582 INFO L628 ElimStorePlain]: treesize reduction 55, result has 60.4 percent of original size [2021-06-05 14:27:52,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:52,583 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:199, output treesize:84 [2021-06-05 14:27:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,703 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 [2021-06-05 14:27:52,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:52,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,707 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 25 treesize of output 19 [2021-06-05 14:27:52,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,747 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:27:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:27:52,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:52,753 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 [2021-06-05 14:27:52,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:52,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:52,776 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 [2021-06-05 14:27:52,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:52,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:52,790 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1799 vanished before elimination [2021-06-05 14:27:52,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:27:52,791 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:27:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301346448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:52,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:52,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:27:52,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994984907] [2021-06-05 14:27:52,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:52,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:52,814 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) [2021-06-05 14:27:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:53,712 INFO L93 Difference]: Finished difference Result 487 states and 1506 transitions. [2021-06-05 14:27:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:27:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:27:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:53,713 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:27:53,713 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:27:53,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 838.7ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:27:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:27:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2021-06-05 14:27:53,717 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) [2021-06-05 14:27:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1297 transitions. [2021-06-05 14:27:53,717 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1297 transitions. Word has length 18 [2021-06-05 14:27:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:53,717 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1297 transitions. [2021-06-05 14:27:53,717 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) [2021-06-05 14:27:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1297 transitions. [2021-06-05 14:27:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:53,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:53,718 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:53,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7038,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:53,918 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash 567267000, now seen corresponding path program 260 times [2021-06-05 14:27:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:53,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728490510] [2021-06-05 14:27:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:54,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728490510] [2021-06-05 14:27:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728490510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113474279] [2021-06-05 14:27:54,074 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 [2021-06-05 14:27:54,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:27:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:54,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:27:54,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:54,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:27:54,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,244 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 17 treesize of output 13 [2021-06-05 14:27:54,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:54,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:54,251 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 [2021-06-05 14:27:54,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,254 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 25 treesize of output 19 [2021-06-05 14:27:54,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,258 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 25 treesize of output 19 [2021-06-05 14:27:54,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:54,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,350 INFO L628 ElimStorePlain]: treesize reduction 46, result has 75.5 percent of original size [2021-06-05 14:27:54,356 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. [2021-06-05 14:27:54,356 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:221, output treesize:142 [2021-06-05 14:27:54,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,594 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 15 treesize of output 11 [2021-06-05 14:27:54,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,599 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 28 treesize of output 22 [2021-06-05 14:27:54,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:27:54,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:54,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,614 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 18 treesize of output 14 [2021-06-05 14:27:54,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,619 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 27 treesize of output 21 [2021-06-05 14:27:54,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,624 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 16 treesize of output 12 [2021-06-05 14:27:54,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,629 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 16 treesize of output 12 [2021-06-05 14:27:54,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,634 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 [2021-06-05 14:27:54,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,639 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 26 treesize of output 20 [2021-06-05 14:27:54,640 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,644 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 [2021-06-05 14:27:54,645 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:27:54,650 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,758 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 14:27:54,759 INFO L628 ElimStorePlain]: treesize reduction 122, result has 49.2 percent of original size [2021-06-05 14:27:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,763 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 [2021-06-05 14:27:54,763 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:54,766 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 10 treesize of output 5 [2021-06-05 14:27:54,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:54,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:54,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:27:54,810 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-05 14:27:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113474279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:27:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094706928] [2021-06-05 14:27:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:54,887 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) [2021-06-05 14:27:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:55,930 INFO L93 Difference]: Finished difference Result 514 states and 1557 transitions. [2021-06-05 14:27:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:27:55,930 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 18 [2021-06-05 14:27:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:55,931 INFO L225 Difference]: With dead ends: 514 [2021-06-05 14:27:55,931 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 14:27:55,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:27:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 14:27:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 417. [2021-06-05 14:27:55,935 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) [2021-06-05 14:27:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1321 transitions. [2021-06-05 14:27:55,936 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1321 transitions. Word has length 18 [2021-06-05 14:27:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:55,936 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1321 transitions. [2021-06-05 14:27:55,936 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) [2021-06-05 14:27:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1321 transitions. [2021-06-05 14:27:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:55,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:55,936 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:56,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7052,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:27:56,137 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash -637878156, now seen corresponding path program 261 times [2021-06-05 14:27:56,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:56,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525381369] [2021-06-05 14:27:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:56,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525381369] [2021-06-05 14:27:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525381369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828147921] [2021-06-05 14:27:56,264 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 [2021-06-05 14:27:56,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:27:56,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:56,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,466 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 15 treesize of output 11 [2021-06-05 14:27:56,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,469 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 16 treesize of output 12 [2021-06-05 14:27:56,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,472 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 16 treesize of output 12 [2021-06-05 14:27:56,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,475 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 25 treesize of output 19 [2021-06-05 14:27:56,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,478 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 26 treesize of output 20 [2021-06-05 14:27:56,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,541 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:27:56,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:56,542 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-06-05 14:27:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,597 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 25 treesize of output 19 [2021-06-05 14:27:56,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,601 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 [2021-06-05 14:27:56,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:56,663 INFO L628 ElimStorePlain]: treesize reduction 92, result has 49.2 percent of original size [2021-06-05 14:27:56,666 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 7 treesize of output 5 [2021-06-05 14:27:56,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,690 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1805 vanished before elimination [2021-06-05 14:27:56,693 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 7 treesize of output 5 [2021-06-05 14:27:56,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,716 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1807 vanished before elimination [2021-06-05 14:27:56,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:27:56,719 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:56,722 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 21 treesize of output 7 [2021-06-05 14:27:56,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:56,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:56,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:27:56,750 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-06-05 14:27:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828147921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:56,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:56,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:27:56,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406322697] [2021-06-05 14:27:56,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:27:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:27:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:27:56,813 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) [2021-06-05 14:27:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:27:57,272 INFO L93 Difference]: Finished difference Result 467 states and 1457 transitions. [2021-06-05 14:27:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:27:57,272 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 [2021-06-05 14:27:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:27:57,273 INFO L225 Difference]: With dead ends: 467 [2021-06-05 14:27:57,273 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 14:27:57,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:27:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 14:27:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 419. [2021-06-05 14:27:57,276 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) [2021-06-05 14:27:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1326 transitions. [2021-06-05 14:27:57,277 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1326 transitions. Word has length 18 [2021-06-05 14:27:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:27:57,277 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1326 transitions. [2021-06-05 14:27:57,277 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) [2021-06-05 14:27:57,277 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1326 transitions. [2021-06-05 14:27:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:27:57,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:27:57,278 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:27:57,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7100 [2021-06-05 14:27:57,478 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:27:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:27:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1954035460, now seen corresponding path program 262 times [2021-06-05 14:27:57,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:27:57,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130065019] [2021-06-05 14:27:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:27:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:27:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:57,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:27:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130065019] [2021-06-05 14:27:57,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130065019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:57,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357444402] [2021-06-05 14:27:57,625 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 [2021-06-05 14:27:57,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:27:57,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:27:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:27:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:27:57,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:27:57,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:27:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:57,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:57,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:57,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:57,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:57,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:27:58,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:58,041 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:58,103 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. [2021-06-05 14:27:58,104 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:191, output treesize:167 [2021-06-05 14:27:58,274 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-05 14:27:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,279 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 [2021-06-05 14:27:58,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,284 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 16 treesize of output 12 [2021-06-05 14:27:58,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,290 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 19 treesize of output 15 [2021-06-05 14:27:58,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,295 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 18 treesize of output 14 [2021-06-05 14:27:58,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,301 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 20 treesize of output 16 [2021-06-05 14:27:58,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:27:58,307 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,312 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 29 treesize of output 23 [2021-06-05 14:27:58,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:27:58,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,322 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 16 treesize of output 12 [2021-06-05 14:27:58,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,328 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 [2021-06-05 14:27:58,328 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,333 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 17 treesize of output 13 [2021-06-05 14:27:58,334 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,337 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 26 treesize of output 20 [2021-06-05 14:27:58,338 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,479 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 14:27:58,479 INFO L628 ElimStorePlain]: treesize reduction 120, result has 57.7 percent of original size [2021-06-05 14:27:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,483 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 11 treesize of output 3 [2021-06-05 14:27:58,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,488 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 21 treesize of output 7 [2021-06-05 14:27:58,489 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:27:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 14:27:58,493 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:27:58,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:27:58,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 14:27:58,548 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:429, output treesize:85 [2021-06-05 14:27:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:27:58,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357444402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:27:58,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:27:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:27:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993607794] [2021-06-05 14:27:58,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:27:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:27:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:27:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:27:58,657 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) [2021-06-05 14:27:59,596 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-06-05 14:27:59,735 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 14:28:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:00,000 INFO L93 Difference]: Finished difference Result 518 states and 1588 transitions. [2021-06-05 14:28:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:28:00,001 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 [2021-06-05 14:28:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:00,001 INFO L225 Difference]: With dead ends: 518 [2021-06-05 14:28:00,001 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:28:00,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1355.9ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:28:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:28:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 425. [2021-06-05 14:28:00,005 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) [2021-06-05 14:28:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1353 transitions. [2021-06-05 14:28:00,006 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1353 transitions. Word has length 18 [2021-06-05 14:28:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:00,006 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1353 transitions. [2021-06-05 14:28:00,006 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) [2021-06-05 14:28:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1353 transitions. [2021-06-05 14:28:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:00,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:00,007 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:00,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7112 [2021-06-05 14:28:00,207 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:00,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:00,207 INFO L82 PathProgramCache]: Analyzing trace with hash -758999286, now seen corresponding path program 263 times [2021-06-05 14:28:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:00,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763043331] [2021-06-05 14:28:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:00,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:00,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763043331] [2021-06-05 14:28:00,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763043331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:00,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018370906] [2021-06-05 14:28:00,383 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 [2021-06-05 14:28:00,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:28:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,638 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 16 treesize of output 12 [2021-06-05 14:28:00,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,643 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 25 treesize of output 19 [2021-06-05 14:28:00,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,648 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 15 treesize of output 11 [2021-06-05 14:28:00,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,652 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 26 treesize of output 20 [2021-06-05 14:28:00,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,657 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 [2021-06-05 14:28:00,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:00,661 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 [2021-06-05 14:28:00,662 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:00,809 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 14:28:00,809 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-06-05 14:28:00,814 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. [2021-06-05 14:28:00,814 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-06-05 14:28:01,038 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1827, array_4], 6=[v_prenex_1826, array_2]} [2021-06-05 14:28:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,044 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 15 treesize of output 11 [2021-06-05 14:28:01,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,050 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 [2021-06-05 14:28:01,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:01,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:01,128 INFO L628 ElimStorePlain]: treesize reduction 172, result has 36.3 percent of original size [2021-06-05 14:28:01,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,131 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 [2021-06-05 14:28:01,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:01,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:01,166 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1826 vanished before elimination [2021-06-05 14:28:01,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,170 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 20 treesize of output 9 [2021-06-05 14:28:01,171 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:01,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:01,174 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 [2021-06-05 14:28:01,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:01,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:01,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:01,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:01,215 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:291, output treesize:54 [2021-06-05 14:28:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018370906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:01,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7257996] [2021-06-05 14:28:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:01,286 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) [2021-06-05 14:28:02,095 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-05 14:28:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:02,647 INFO L93 Difference]: Finished difference Result 526 states and 1614 transitions. [2021-06-05 14:28:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:28:02,647 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 [2021-06-05 14:28:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:02,648 INFO L225 Difference]: With dead ends: 526 [2021-06-05 14:28:02,648 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:28:02,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1293.5ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:28:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:28:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 433. [2021-06-05 14:28:02,652 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) [2021-06-05 14:28:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1383 transitions. [2021-06-05 14:28:02,653 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1383 transitions. Word has length 18 [2021-06-05 14:28:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:02,653 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1383 transitions. [2021-06-05 14:28:02,653 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) [2021-06-05 14:28:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1383 transitions. [2021-06-05 14:28:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:02,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:02,653 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:02,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7141,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:02,854 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash 722238584, now seen corresponding path program 264 times [2021-06-05 14:28:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:02,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764701231] [2021-06-05 14:28:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:02,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764701231] [2021-06-05 14:28:02,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764701231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687304498] [2021-06-05 14:28:02,971 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 [2021-06-05 14:28:02,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:28:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:02,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:03,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:03,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,218 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 26 treesize of output 20 [2021-06-05 14:28:03,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,223 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 16 treesize of output 12 [2021-06-05 14:28:03,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:03,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,232 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 [2021-06-05 14:28:03,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,236 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 [2021-06-05 14:28:03,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,387 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 14:28:03,387 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-06-05 14:28:03,391 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. [2021-06-05 14:28:03,392 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-06-05 14:28:03,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:03,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,600 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 [2021-06-05 14:28:03,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:03,659 INFO L628 ElimStorePlain]: treesize reduction 78, result has 50.0 percent of original size [2021-06-05 14:28:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,663 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 20 treesize of output 9 [2021-06-05 14:28:03,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:03,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2021-06-05 14:28:03,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,697 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 7 treesize of output 5 [2021-06-05 14:28:03,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:03,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:03,717 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:03,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:03,718 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:154, output treesize:22 [2021-06-05 14:28:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:03,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687304498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:03,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:03,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647195444] [2021-06-05 14:28:03,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:03,745 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) [2021-06-05 14:28:04,469 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-05 14:28:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:05,140 INFO L93 Difference]: Finished difference Result 521 states and 1625 transitions. [2021-06-05 14:28:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:28:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:28:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:05,141 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:28:05,141 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 14:28:05,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:28:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 14:28:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 426. [2021-06-05 14:28:05,145 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) [2021-06-05 14:28:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1366 transitions. [2021-06-05 14:28:05,146 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1366 transitions. Word has length 18 [2021-06-05 14:28:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:05,146 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1366 transitions. [2021-06-05 14:28:05,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1366 transitions. [2021-06-05 14:28:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:05,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:05,146 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:05,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7167 [2021-06-05 14:28:05,347 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1742014878, now seen corresponding path program 265 times [2021-06-05 14:28:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:05,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830013962] [2021-06-05 14:28:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:05,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:05,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830013962] [2021-06-05 14:28:05,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830013962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:05,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053962094] [2021-06-05 14:28:05,445 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 [2021-06-05 14:28:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:05,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:05,518 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 15 treesize of output 11 [2021-06-05 14:28:05,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:05,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:05,523 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 24 treesize of output 18 [2021-06-05 14:28:05,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:05,557 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-06-05 14:28:05,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:05,558 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-05 14:28:05,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:05,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:05,648 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:28:05,648 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:05,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:05,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:28:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:05,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053962094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:05,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:05,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:28:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120045857] [2021-06-05 14:28:05,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:28:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:28:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:28:05,672 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) [2021-06-05 14:28:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:06,007 INFO L93 Difference]: Finished difference Result 551 states and 1707 transitions. [2021-06-05 14:28:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:06,008 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 [2021-06-05 14:28:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:06,008 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:28:06,008 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:28:06,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:28:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 430. [2021-06-05 14:28:06,012 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) [2021-06-05 14:28:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1386 transitions. [2021-06-05 14:28:06,013 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1386 transitions. Word has length 18 [2021-06-05 14:28:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:06,013 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1386 transitions. [2021-06-05 14:28:06,013 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) [2021-06-05 14:28:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1386 transitions. [2021-06-05 14:28:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:06,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:06,014 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:06,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7196,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:06,214 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash -885518932, now seen corresponding path program 266 times [2021-06-05 14:28:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:06,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73173713] [2021-06-05 14:28:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:06,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:06,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73173713] [2021-06-05 14:28:06,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73173713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:06,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074548874] [2021-06-05 14:28:06,355 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 [2021-06-05 14:28:06,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:06,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:06,427 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 15 treesize of output 11 [2021-06-05 14:28:06,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,430 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 24 treesize of output 18 [2021-06-05 14:28:06,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,433 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 [2021-06-05 14:28:06,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:06,469 INFO L628 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2021-06-05 14:28:06,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:06,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-06-05 14:28:06,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:06,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:06,576 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:28:06,576 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:06,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:06,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:28:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074548874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:06,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:06,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:28:06,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172910170] [2021-06-05 14:28:06,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:28:06,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:28:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:28:06,596 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) [2021-06-05 14:28:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:06,955 INFO L93 Difference]: Finished difference Result 548 states and 1703 transitions. [2021-06-05 14:28:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:06,955 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 [2021-06-05 14:28:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:06,956 INFO L225 Difference]: With dead ends: 548 [2021-06-05 14:28:06,956 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:28:06,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:28:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 433. [2021-06-05 14:28:06,960 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) [2021-06-05 14:28:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1398 transitions. [2021-06-05 14:28:06,961 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1398 transitions. Word has length 18 [2021-06-05 14:28:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:06,961 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1398 transitions. [2021-06-05 14:28:06,961 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) [2021-06-05 14:28:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1398 transitions. [2021-06-05 14:28:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:06,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:06,962 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:07,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7202 [2021-06-05 14:28:07,162 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1469459618, now seen corresponding path program 267 times [2021-06-05 14:28:07,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:07,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074962769] [2021-06-05 14:28:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:07,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:07,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074962769] [2021-06-05 14:28:07,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074962769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:07,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357070858] [2021-06-05 14:28:07,280 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 [2021-06-05 14:28:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:28:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:07,352 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 15 treesize of output 11 [2021-06-05 14:28:07,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:07,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,358 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 25 treesize of output 19 [2021-06-05 14:28:07,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,395 INFO L628 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2021-06-05 14:28:07,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:07,395 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-06-05 14:28:07,475 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1839], 1=[array_4, v_prenex_1840]} [2021-06-05 14:28:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:07,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,480 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 25 treesize of output 19 [2021-06-05 14:28:07,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,520 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-05 14:28:07,522 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 [2021-06-05 14:28:07,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:07,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:07,541 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:07,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:07,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,546 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 11 treesize of output 3 [2021-06-05 14:28:07,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:07,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:07,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:07,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:07,571 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-06-05 14:28:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:07,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357070858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:07,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:07,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:28:07,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556470500] [2021-06-05 14:28:07,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:28:07,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:07,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:28:07,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:28:07,631 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) [2021-06-05 14:28:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:08,018 INFO L93 Difference]: Finished difference Result 554 states and 1727 transitions. [2021-06-05 14:28:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:08,018 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 [2021-06-05 14:28:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:08,019 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:28:08,019 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:28:08,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:28:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 420. [2021-06-05 14:28:08,023 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) [2021-06-05 14:28:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1349 transitions. [2021-06-05 14:28:08,024 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1349 transitions. Word has length 18 [2021-06-05 14:28:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:08,024 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1349 transitions. [2021-06-05 14:28:08,024 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) [2021-06-05 14:28:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1349 transitions. [2021-06-05 14:28:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:08,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:08,025 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:08,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7209,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:08,225 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash 603886064, now seen corresponding path program 268 times [2021-06-05 14:28:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:08,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939081675] [2021-06-05 14:28:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:08,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939081675] [2021-06-05 14:28:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939081675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702827837] [2021-06-05 14:28:08,353 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 [2021-06-05 14:28:08,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,443 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 24 treesize of output 18 [2021-06-05 14:28:08,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:08,446 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 [2021-06-05 14:28:08,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,449 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 15 treesize of output 11 [2021-06-05 14:28:08,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:08,489 INFO L628 ElimStorePlain]: treesize reduction 27, result has 68.2 percent of original size [2021-06-05 14:28:08,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:08,490 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-05 14:28:08,574 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 [2021-06-05 14:28:08,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:08,586 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-05 14:28:08,587 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:08,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:08,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-05 14:28:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702827837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:28:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138436955] [2021-06-05 14:28:08,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:28:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:28:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:28:08,611 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) [2021-06-05 14:28:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:08,932 INFO L93 Difference]: Finished difference Result 509 states and 1598 transitions. [2021-06-05 14:28:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:08,933 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 [2021-06-05 14:28:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:08,933 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:28:08,933 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:28:08,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:28:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 432. [2021-06-05 14:28:08,937 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) [2021-06-05 14:28:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1389 transitions. [2021-06-05 14:28:08,938 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1389 transitions. Word has length 18 [2021-06-05 14:28:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:08,938 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1389 transitions. [2021-06-05 14:28:08,938 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) [2021-06-05 14:28:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1389 transitions. [2021-06-05 14:28:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:08,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:08,939 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:09,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7222 [2021-06-05 14:28:09,139 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1336102682, now seen corresponding path program 269 times [2021-06-05 14:28:09,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:09,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389793489] [2021-06-05 14:28:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:09,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389793489] [2021-06-05 14:28:09,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389793489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501866363] [2021-06-05 14:28:09,254 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 [2021-06-05 14:28:09,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:09,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:09,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:09,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:09,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:09,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:09,418 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. [2021-06-05 14:28:09,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-05 14:28:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,493 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 27 treesize of output 21 [2021-06-05 14:28:09,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:09,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,498 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 [2021-06-05 14:28:09,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,502 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 [2021-06-05 14:28:09,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,506 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 17 treesize of output 13 [2021-06-05 14:28:09,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,581 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:28:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,584 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 11 treesize of output 3 [2021-06-05 14:28:09,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,588 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 21 treesize of output 7 [2021-06-05 14:28:09,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:09,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:09,597 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 9 treesize of output 3 [2021-06-05 14:28:09,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:09,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:09,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:09,632 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-05 14:28:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:09,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501866363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:09,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:09,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:09,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793303628] [2021-06-05 14:28:09,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:09,709 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) [2021-06-05 14:28:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:10,230 INFO L93 Difference]: Finished difference Result 513 states and 1615 transitions. [2021-06-05 14:28:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:28:10,230 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 [2021-06-05 14:28:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:10,231 INFO L225 Difference]: With dead ends: 513 [2021-06-05 14:28:10,231 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:28:10,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:28:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 426. [2021-06-05 14:28:10,235 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) [2021-06-05 14:28:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1367 transitions. [2021-06-05 14:28:10,235 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1367 transitions. Word has length 18 [2021-06-05 14:28:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:10,236 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1367 transitions. [2021-06-05 14:28:10,236 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) [2021-06-05 14:28:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1367 transitions. [2021-06-05 14:28:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:10,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:10,236 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:10,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7231 [2021-06-05 14:28:10,437 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:10,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2085123934, now seen corresponding path program 270 times [2021-06-05 14:28:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:10,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996764190] [2021-06-05 14:28:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:10,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:10,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996764190] [2021-06-05 14:28:10,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996764190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:10,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832229350] [2021-06-05 14:28:10,530 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 [2021-06-05 14:28:10,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:28:10,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:10,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,662 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 [2021-06-05 14:28:10,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,665 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 [2021-06-05 14:28:10,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,697 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. [2021-06-05 14:28:10,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-05 14:28:10,761 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:28:10,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,765 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 25 treesize of output 19 [2021-06-05 14:28:10,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,769 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 15 treesize of output 11 [2021-06-05 14:28:10,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:10,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,776 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 27 treesize of output 21 [2021-06-05 14:28:10,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:10,840 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-05 14:28:10,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,843 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 11 treesize of output 3 [2021-06-05 14:28:10,844 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:10,847 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 [2021-06-05 14:28:10,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:10,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:10,882 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:38 [2021-06-05 14:28:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:10,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832229350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:10,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:10,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:10,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091241122] [2021-06-05 14:28:10,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:10,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:10,941 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) [2021-06-05 14:28:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:11,440 INFO L93 Difference]: Finished difference Result 521 states and 1641 transitions. [2021-06-05 14:28:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:28:11,440 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 [2021-06-05 14:28:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:11,441 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:28:11,441 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:28:11,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:11,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:28:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 415. [2021-06-05 14:28:11,445 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) [2021-06-05 14:28:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1334 transitions. [2021-06-05 14:28:11,445 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1334 transitions. Word has length 18 [2021-06-05 14:28:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:11,446 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1334 transitions. [2021-06-05 14:28:11,446 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) [2021-06-05 14:28:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1334 transitions. [2021-06-05 14:28:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:11,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:11,446 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:11,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7245 [2021-06-05 14:28:11,647 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1483849440, now seen corresponding path program 271 times [2021-06-05 14:28:11,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:11,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429508876] [2021-06-05 14:28:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:11,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429508876] [2021-06-05 14:28:11,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429508876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:11,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172308939] [2021-06-05 14:28:11,805 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 [2021-06-05 14:28:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:11,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:11,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,892 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 25 treesize of output 19 [2021-06-05 14:28:11,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,895 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 26 treesize of output 20 [2021-06-05 14:28:11,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:11,898 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 16 treesize of output 12 [2021-06-05 14:28:11,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,901 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 15 treesize of output 11 [2021-06-05 14:28:11,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:11,968 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:28:11,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:11,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:28:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,184 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 27 treesize of output 21 [2021-06-05 14:28:12,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:12,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,187 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 25 treesize of output 19 [2021-06-05 14:28:12,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,230 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:28:12,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:28:12,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:12,248 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:12,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:28:12,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:12,253 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 21 treesize of output 7 [2021-06-05 14:28:12,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:12,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:12,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:12,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:12,275 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:28:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:12,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172308939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:12,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:12,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989374383] [2021-06-05 14:28:12,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:12,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:12,299 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) [2021-06-05 14:28:12,723 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-05 14:28:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:13,050 INFO L93 Difference]: Finished difference Result 586 states and 1779 transitions. [2021-06-05 14:28:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:13,051 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 [2021-06-05 14:28:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:13,051 INFO L225 Difference]: With dead ends: 586 [2021-06-05 14:28:13,051 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 14:28:13,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 14:28:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 418. [2021-06-05 14:28:13,056 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) [2021-06-05 14:28:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1341 transitions. [2021-06-05 14:28:13,056 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1341 transitions. Word has length 18 [2021-06-05 14:28:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:13,056 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1341 transitions. [2021-06-05 14:28:13,057 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) [2021-06-05 14:28:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1341 transitions. [2021-06-05 14:28:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:13,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:13,057 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:13,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-05 14:28:13,257 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:13,258 INFO L82 PathProgramCache]: Analyzing trace with hash 862051502, now seen corresponding path program 272 times [2021-06-05 14:28:13,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:13,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948010179] [2021-06-05 14:28:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:13,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:13,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948010179] [2021-06-05 14:28:13,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948010179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:13,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381218465] [2021-06-05 14:28:13,531 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 [2021-06-05 14:28:13,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:13,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,612 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 [2021-06-05 14:28:13,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,616 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 26 treesize of output 20 [2021-06-05 14:28:13,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,619 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 [2021-06-05 14:28:13,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,622 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 [2021-06-05 14:28:13,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,688 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-05 14:28:13,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:13,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-05 14:28:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,905 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 27 treesize of output 21 [2021-06-05 14:28:13,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:13,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,908 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 [2021-06-05 14:28:13,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,931 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:28:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:13,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:13,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:13,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:13,940 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:28:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:13,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381218465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:13,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:13,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766376806] [2021-06-05 14:28:13,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:13,962 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) [2021-06-05 14:28:14,388 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 14:28:14,551 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 14:28:14,741 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2021-06-05 14:28:14,984 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 14:28:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:15,321 INFO L93 Difference]: Finished difference Result 645 states and 1951 transitions. [2021-06-05 14:28:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:28:15,322 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 [2021-06-05 14:28:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:15,322 INFO L225 Difference]: With dead ends: 645 [2021-06-05 14:28:15,322 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:28:15,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:28:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:28:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 429. [2021-06-05 14:28:15,327 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) [2021-06-05 14:28:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1385 transitions. [2021-06-05 14:28:15,328 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1385 transitions. Word has length 18 [2021-06-05 14:28:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:15,328 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1385 transitions. [2021-06-05 14:28:15,328 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) [2021-06-05 14:28:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1385 transitions. [2021-06-05 14:28:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:15,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:15,328 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:15,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7269 [2021-06-05 14:28:15,529 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -746532768, now seen corresponding path program 273 times [2021-06-05 14:28:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:15,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174834361] [2021-06-05 14:28:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:15,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174834361] [2021-06-05 14:28:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174834361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:15,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694378583] [2021-06-05 14:28:15,696 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 [2021-06-05 14:28:15,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:28:15,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:15,778 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 15 treesize of output 11 [2021-06-05 14:28:15,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:15,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,785 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 35 treesize of output 27 [2021-06-05 14:28:15,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:15,789 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 25 treesize of output 19 [2021-06-05 14:28:15,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,793 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 25 treesize of output 19 [2021-06-05 14:28:15,793 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:15,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:15,908 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:28:15,908 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-05 14:28:15,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:15,909 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-05 14:28:16,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,403 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 [2021-06-05 14:28:16,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,409 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 16 treesize of output 12 [2021-06-05 14:28:16,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,415 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 [2021-06-05 14:28:16,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:16,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,427 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 [2021-06-05 14:28:16,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:16,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:16,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:16,446 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,451 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 27 treesize of output 21 [2021-06-05 14:28:16,452 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,458 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 26 treesize of output 20 [2021-06-05 14:28:16,458 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,464 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 [2021-06-05 14:28:16,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,470 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 [2021-06-05 14:28:16,471 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:16,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,481 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 28 treesize of output 22 [2021-06-05 14:28:16,481 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,633 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-05 14:28:16,633 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:28:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,652 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 20 treesize of output 9 [2021-06-05 14:28:16,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:16,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:28:16,658 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:16,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:16,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:28:16,718 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:28:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:16,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694378583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:16,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:16,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:16,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955420914] [2021-06-05 14:28:16,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:16,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:16,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:16,803 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) [2021-06-05 14:28:17,314 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 14:28:17,615 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-06-05 14:28:17,846 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 14:28:18,206 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 130 [2021-06-05 14:28:18,506 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-05 14:28:18,747 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 14:28:19,158 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 139 [2021-06-05 14:28:19,468 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2021-06-05 14:28:19,794 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2021-06-05 14:28:20,000 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 14:28:20,340 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-06-05 14:28:20,601 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2021-06-05 14:28:20,876 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-05 14:28:21,064 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 14:28:21,361 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2021-06-05 14:28:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:21,408 INFO L93 Difference]: Finished difference Result 651 states and 1990 transitions. [2021-06-05 14:28:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:28:21,408 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 [2021-06-05 14:28:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:21,413 INFO L225 Difference]: With dead ends: 651 [2021-06-05 14:28:21,413 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 14:28:21,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4523.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:28:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 14:28:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 426. [2021-06-05 14:28:21,419 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) [2021-06-05 14:28:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1373 transitions. [2021-06-05 14:28:21,420 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1373 transitions. Word has length 18 [2021-06-05 14:28:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:21,420 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1373 transitions. [2021-06-05 14:28:21,420 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) [2021-06-05 14:28:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1373 transitions. [2021-06-05 14:28:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:21,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:21,421 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:21,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7282,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:21,642 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1951677924, now seen corresponding path program 274 times [2021-06-05 14:28:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118099294] [2021-06-05 14:28:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:21,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:21,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118099294] [2021-06-05 14:28:21,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118099294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:21,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999551770] [2021-06-05 14:28:21,833 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 [2021-06-05 14:28:21,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:21,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:21,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,916 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 26 treesize of output 20 [2021-06-05 14:28:21,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:21,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:21,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:21,922 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 [2021-06-05 14:28:21,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:21,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:21,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:21,994 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:28:21,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:21,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:28:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:22,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:22,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,161 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 17 treesize of output 13 [2021-06-05 14:28:22,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:22,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,168 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 17 treesize of output 13 [2021-06-05 14:28:22,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,172 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 [2021-06-05 14:28:22,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,175 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 15 treesize of output 11 [2021-06-05 14:28:22,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,230 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-06-05 14:28:22,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,233 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 [2021-06-05 14:28:22,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:22,235 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 21 treesize of output 7 [2021-06-05 14:28:22,236 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:22,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:22,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:22,264 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-06-05 14:28:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:22,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999551770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:22,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:22,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750596473] [2021-06-05 14:28:22,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:22,331 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) [2021-06-05 14:28:22,810 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 14:28:22,955 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 14:28:23,164 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-05 14:28:23,316 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 14:28:23,468 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 14:28:23,674 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 14:28:23,833 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 14:28:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:24,024 INFO L93 Difference]: Finished difference Result 624 states and 1899 transitions. [2021-06-05 14:28:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:28:24,024 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 [2021-06-05 14:28:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:24,025 INFO L225 Difference]: With dead ends: 624 [2021-06-05 14:28:24,025 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 14:28:24,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1627.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:28:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 14:28:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 429. [2021-06-05 14:28:24,030 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) [2021-06-05 14:28:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-05 14:28:24,030 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-05 14:28:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:24,030 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-05 14:28:24,030 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) [2021-06-05 14:28:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-05 14:28:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:24,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:24,031 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:24,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7312 [2021-06-05 14:28:24,231 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1063225658, now seen corresponding path program 275 times [2021-06-05 14:28:24,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:24,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972733266] [2021-06-05 14:28:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:24,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:24,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972733266] [2021-06-05 14:28:24,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972733266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:24,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138427089] [2021-06-05 14:28:24,409 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 [2021-06-05 14:28:24,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:24,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:24,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:24,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,487 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 25 treesize of output 19 [2021-06-05 14:28:24,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,491 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 [2021-06-05 14:28:24,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,495 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 26 treesize of output 20 [2021-06-05 14:28:24,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,498 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 [2021-06-05 14:28:24,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,502 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 [2021-06-05 14:28:24,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,505 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 24 treesize of output 18 [2021-06-05 14:28:24,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,569 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-05 14:28:24,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:24,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:24,815 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1860], 1=[v_prenex_1859, array_0]} [2021-06-05 14:28:24,818 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 [2021-06-05 14:28:24,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:24,822 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 25 treesize of output 19 [2021-06-05 14:28:24,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,864 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:28:24,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:28:24,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1859 vanished before elimination [2021-06-05 14:28:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,885 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 11 treesize of output 3 [2021-06-05 14:28:24,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:24,888 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 21 treesize of output 7 [2021-06-05 14:28:24,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:24,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:24,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:24,910 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:28:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:24,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138427089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:24,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:24,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:24,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042478781] [2021-06-05 14:28:24,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:24,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:24,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:24,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:24,933 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) [2021-06-05 14:28:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:25,639 INFO L93 Difference]: Finished difference Result 593 states and 1821 transitions. [2021-06-05 14:28:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:25,639 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 [2021-06-05 14:28:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:25,640 INFO L225 Difference]: With dead ends: 593 [2021-06-05 14:28:25,640 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:28:25,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:28:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 434. [2021-06-05 14:28:25,644 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) [2021-06-05 14:28:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1411 transitions. [2021-06-05 14:28:25,645 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1411 transitions. Word has length 18 [2021-06-05 14:28:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:25,645 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1411 transitions. [2021-06-05 14:28:25,645 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) [2021-06-05 14:28:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1411 transitions. [2021-06-05 14:28:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:25,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:25,646 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:25,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7323,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:25,846 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1919721604, now seen corresponding path program 276 times [2021-06-05 14:28:25,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:25,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277456252] [2021-06-05 14:28:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:26,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277456252] [2021-06-05 14:28:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277456252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647882143] [2021-06-05 14:28:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:28:26,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:28:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,090 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 [2021-06-05 14:28:26,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,094 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 16 treesize of output 12 [2021-06-05 14:28:26,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,097 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 [2021-06-05 14:28:26,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,101 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 [2021-06-05 14:28:26,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,105 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 15 treesize of output 11 [2021-06-05 14:28:26,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,108 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 24 treesize of output 18 [2021-06-05 14:28:26,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,172 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:26,173 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:26,442 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1865], 1=[array_0, v_prenex_1864]} [2021-06-05 14:28:26,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:26,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:26,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:26,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,490 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:28:26,492 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 7 treesize of output 5 [2021-06-05 14:28:26,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:26,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:26,514 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 11 treesize of output 3 [2021-06-05 14:28:26,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:26,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:26,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:26,535 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1864 vanished before elimination [2021-06-05 14:28:26,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:26,537 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:28:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647882143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:26,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:26,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715754925] [2021-06-05 14:28:26,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:26,560 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) [2021-06-05 14:28:27,211 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 14:28:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:27,362 INFO L93 Difference]: Finished difference Result 589 states and 1822 transitions. [2021-06-05 14:28:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:27,362 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 [2021-06-05 14:28:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:27,363 INFO L225 Difference]: With dead ends: 589 [2021-06-05 14:28:27,363 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 14:28:27,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 814.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 14:28:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2021-06-05 14:28:27,367 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) [2021-06-05 14:28:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1423 transitions. [2021-06-05 14:28:27,368 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1423 transitions. Word has length 18 [2021-06-05 14:28:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:27,368 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1423 transitions. [2021-06-05 14:28:27,368 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) [2021-06-05 14:28:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1423 transitions. [2021-06-05 14:28:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:27,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:27,369 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:27,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7340 [2021-06-05 14:28:27,569 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -20267142, now seen corresponding path program 277 times [2021-06-05 14:28:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75197687] [2021-06-05 14:28:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:27,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75197687] [2021-06-05 14:28:27,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75197687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:27,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019835511] [2021-06-05 14:28:27,731 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 [2021-06-05 14:28:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:27,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:27,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,829 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 16 treesize of output 12 [2021-06-05 14:28:27,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:27,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:27,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,840 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 [2021-06-05 14:28:27,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:27,843 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 24 treesize of output 18 [2021-06-05 14:28:27,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:27,906 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:27,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:27,907 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:28,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,126 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 25 treesize of output 19 [2021-06-05 14:28:28,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,130 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 35 treesize of output 27 [2021-06-05 14:28:28,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:28,201 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-06-05 14:28:28,204 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 7 treesize of output 5 [2021-06-05 14:28:28,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:28,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:28,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:28,230 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 21 treesize of output 7 [2021-06-05 14:28:28,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:28,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:28,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:28,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:28,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:28,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1870 vanished before elimination [2021-06-05 14:28:28,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:28,263 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-06-05 14:28:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019835511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396564593] [2021-06-05 14:28:28,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:28,328 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) [2021-06-05 14:28:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:29,110 INFO L93 Difference]: Finished difference Result 606 states and 1865 transitions. [2021-06-05 14:28:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:29,111 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 [2021-06-05 14:28:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:29,112 INFO L225 Difference]: With dead ends: 606 [2021-06-05 14:28:29,112 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 14:28:29,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 818.4ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 14:28:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-06-05 14:28:29,116 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) [2021-06-05 14:28:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-05 14:28:29,117 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-05 14:28:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:29,117 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-05 14:28:29,117 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) [2021-06-05 14:28:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-05 14:28:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:29,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:29,117 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:29,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7358,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:29,318 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1764290236, now seen corresponding path program 278 times [2021-06-05 14:28:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:29,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549090213] [2021-06-05 14:28:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:29,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549090213] [2021-06-05 14:28:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549090213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291241127] [2021-06-05 14:28:29,457 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 [2021-06-05 14:28:29,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:29,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:29,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:29,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,552 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 25 treesize of output 19 [2021-06-05 14:28:29,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,555 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 26 treesize of output 20 [2021-06-05 14:28:29,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,558 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 16 treesize of output 12 [2021-06-05 14:28:29,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,561 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 [2021-06-05 14:28:29,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,627 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-05 14:28:29,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:29,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-05 14:28:29,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:29,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:29,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:29,859 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-05 14:28:29,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:29,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:29,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:29,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:29,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-05 14:28:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:29,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291241127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:29,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:29,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681929213] [2021-06-05 14:28:29,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:29,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:29,889 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) [2021-06-05 14:28:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:30,484 INFO L93 Difference]: Finished difference Result 616 states and 1895 transitions. [2021-06-05 14:28:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:30,484 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 [2021-06-05 14:28:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:30,485 INFO L225 Difference]: With dead ends: 616 [2021-06-05 14:28:30,485 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 14:28:30,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 14:28:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 433. [2021-06-05 14:28:30,490 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) [2021-06-05 14:28:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1407 transitions. [2021-06-05 14:28:30,491 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1407 transitions. Word has length 18 [2021-06-05 14:28:30,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:30,491 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1407 transitions. [2021-06-05 14:28:30,491 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) [2021-06-05 14:28:30,491 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1407 transitions. [2021-06-05 14:28:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:30,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:30,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:30,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7376 [2021-06-05 14:28:30,692 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:30,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938280, now seen corresponding path program 279 times [2021-06-05 14:28:30,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:30,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941171739] [2021-06-05 14:28:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:30,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941171739] [2021-06-05 14:28:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941171739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75817200] [2021-06-05 14:28:30,858 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 [2021-06-05 14:28:30,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,941 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 15 treesize of output 11 [2021-06-05 14:28:30,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,944 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 16 treesize of output 12 [2021-06-05 14:28:30,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:30,948 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 [2021-06-05 14:28:30,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:30,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,030 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.7 percent of original size [2021-06-05 14:28:31,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:31,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:117 [2021-06-05 14:28:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,245 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 17 treesize of output 13 [2021-06-05 14:28:31,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:31,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,280 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-05 14:28:31,281 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:28:31,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,283 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 27 treesize of output 21 [2021-06-05 14:28:31,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:31,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,301 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 21 treesize of output 7 [2021-06-05 14:28:31,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:31,304 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 11 treesize of output 3 [2021-06-05 14:28:31,305 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:31,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:31,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:31,326 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:28:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:31,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75817200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:31,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:31,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969483100] [2021-06-05 14:28:31,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:31,349 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) [2021-06-05 14:28:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:32,286 INFO L93 Difference]: Finished difference Result 613 states and 1901 transitions. [2021-06-05 14:28:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:28:32,287 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 [2021-06-05 14:28:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:32,288 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:28:32,288 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 14:28:32,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:28:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 14:28:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-06-05 14:28:32,292 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) [2021-06-05 14:28:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-05 14:28:32,293 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-05 14:28:32,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:32,293 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-05 14:28:32,293 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) [2021-06-05 14:28:32,293 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-05 14:28:32,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:32,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:32,293 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:32,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7389 [2021-06-05 14:28:32,494 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:32,494 INFO L82 PathProgramCache]: Analyzing trace with hash -446381756, now seen corresponding path program 280 times [2021-06-05 14:28:32,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:32,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133928585] [2021-06-05 14:28:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:32,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133928585] [2021-06-05 14:28:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133928585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16531165] [2021-06-05 14:28:32,648 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 [2021-06-05 14:28:32,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:32,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:32,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:32,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:32,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,724 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 [2021-06-05 14:28:32,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,728 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 [2021-06-05 14:28:32,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,732 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 26 treesize of output 20 [2021-06-05 14:28:32,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,735 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 25 treesize of output 19 [2021-06-05 14:28:32,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,739 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 15 treesize of output 11 [2021-06-05 14:28:32,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:32,742 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 24 treesize of output 18 [2021-06-05 14:28:32,743 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:32,805 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:32,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:32,806 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:33,081 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1880, array_4], 1=[v_prenex_1879, array_0]} [2021-06-05 14:28:33,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:33,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:33,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:33,129 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-05 14:28:33,131 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 7 treesize of output 5 [2021-06-05 14:28:33,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:33,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:33,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:28:33,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:33,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:33,173 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:28:33,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:33,174 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:28:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:33,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16531165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:33,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:33,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:33,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921084591] [2021-06-05 14:28:33,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:33,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:33,195 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) [2021-06-05 14:28:33,566 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 14:28:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:33,758 INFO L93 Difference]: Finished difference Result 558 states and 1726 transitions. [2021-06-05 14:28:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:33,758 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 [2021-06-05 14:28:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:33,759 INFO L225 Difference]: With dead ends: 558 [2021-06-05 14:28:33,759 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:28:33,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:28:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 431. [2021-06-05 14:28:33,763 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) [2021-06-05 14:28:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1395 transitions. [2021-06-05 14:28:33,764 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1395 transitions. Word has length 18 [2021-06-05 14:28:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:33,764 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1395 transitions. [2021-06-05 14:28:33,764 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) [2021-06-05 14:28:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1395 transitions. [2021-06-05 14:28:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:33,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:33,764 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:33,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7401 [2021-06-05 14:28:33,965 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:33,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2024323972, now seen corresponding path program 281 times [2021-06-05 14:28:33,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:33,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129932615] [2021-06-05 14:28:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:34,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:34,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129932615] [2021-06-05 14:28:34,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129932615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:34,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336473690] [2021-06-05 14:28:34,209 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 [2021-06-05 14:28:34,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:28:34,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,286 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 15 treesize of output 11 [2021-06-05 14:28:34,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,289 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 16 treesize of output 12 [2021-06-05 14:28:34,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:34,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:34,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,324 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:28:34,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:34,325 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:28:34,534 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-05 14:28:34,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,538 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 25 treesize of output 19 [2021-06-05 14:28:34,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:34,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,545 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 [2021-06-05 14:28:34,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:34,549 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 [2021-06-05 14:28:34,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,620 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:28:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:28:34,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,627 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 21 treesize of output 7 [2021-06-05 14:28:34,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:34,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:34,637 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 9 treesize of output 3 [2021-06-05 14:28:34,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:34,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:34,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:34,669 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-05 14:28:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:34,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336473690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:34,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:34,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:28:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875541591] [2021-06-05 14:28:34,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:28:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:28:34,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:28:34,748 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) [2021-06-05 14:28:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:35,765 INFO L93 Difference]: Finished difference Result 561 states and 1758 transitions. [2021-06-05 14:28:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:28:35,766 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 [2021-06-05 14:28:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:35,766 INFO L225 Difference]: With dead ends: 561 [2021-06-05 14:28:35,766 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:28:35,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1036.1ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:28:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:28:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 432. [2021-06-05 14:28:35,771 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) [2021-06-05 14:28:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1397 transitions. [2021-06-05 14:28:35,771 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1397 transitions. Word has length 18 [2021-06-05 14:28:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:35,771 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1397 transitions. [2021-06-05 14:28:35,771 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) [2021-06-05 14:28:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1397 transitions. [2021-06-05 14:28:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:35,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:35,772 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:35,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7418 [2021-06-05 14:28:35,972 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1950951492, now seen corresponding path program 282 times [2021-06-05 14:28:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:35,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600214798] [2021-06-05 14:28:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:36,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:36,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600214798] [2021-06-05 14:28:36,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600214798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:36,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192316992] [2021-06-05 14:28:36,179 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 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 [2021-06-05 14:28:36,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:28:36,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:36,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,270 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 16 treesize of output 12 [2021-06-05 14:28:36,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,274 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 26 treesize of output 20 [2021-06-05 14:28:36,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,277 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 25 treesize of output 19 [2021-06-05 14:28:36,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,281 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 15 treesize of output 11 [2021-06-05 14:28:36,282 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,284 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 24 treesize of output 18 [2021-06-05 14:28:36,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,347 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:36,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:36,348 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:36,501 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1888], 1=[array_0, v_prenex_1887]} [2021-06-05 14:28:36,504 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 [2021-06-05 14:28:36,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,508 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 17 treesize of output 13 [2021-06-05 14:28:36,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:36,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:36,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,563 INFO L628 ElimStorePlain]: treesize reduction 88, result has 42.1 percent of original size [2021-06-05 14:28:36,565 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 27 treesize of output 21 [2021-06-05 14:28:36,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:36,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:36,590 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:28:36,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:36,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:36,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:28:36,596 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:36,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:36,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:36,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:36,625 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:180, output treesize:53 [2021-06-05 14:28:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192316992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:36,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:36,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833385409] [2021-06-05 14:28:36,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:36,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:36,700 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) [2021-06-05 14:28:37,078 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 14:28:37,258 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 14:28:37,465 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 14:28:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:37,529 INFO L93 Difference]: Finished difference Result 537 states and 1687 transitions. [2021-06-05 14:28:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:37,530 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 [2021-06-05 14:28:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:37,531 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:28:37,531 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:28:37,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 955.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:28:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 430. [2021-06-05 14:28:37,535 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) [2021-06-05 14:28:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1393 transitions. [2021-06-05 14:28:37,535 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1393 transitions. Word has length 18 [2021-06-05 14:28:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:37,535 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1393 transitions. [2021-06-05 14:28:37,536 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) [2021-06-05 14:28:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1393 transitions. [2021-06-05 14:28:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:37,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:37,536 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:37,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7431 [2021-06-05 14:28:37,737 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:37,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1782463162, now seen corresponding path program 283 times [2021-06-05 14:28:37,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:37,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373362321] [2021-06-05 14:28:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:37,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:37,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373362321] [2021-06-05 14:28:37,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373362321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:37,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472111071] [2021-06-05 14:28:37,930 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 [2021-06-05 14:28:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:38,020 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 15 treesize of output 11 [2021-06-05 14:28:38,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,023 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 34 treesize of output 26 [2021-06-05 14:28:38,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,026 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 35 treesize of output 27 [2021-06-05 14:28:38,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:38,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:38,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,037 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 24 treesize of output 18 [2021-06-05 14:28:38,038 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,148 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:28:38,148 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-05 14:28:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:38,150 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-05 14:28:38,478 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 14:28:38,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,631 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 [2021-06-05 14:28:38,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,636 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 25 treesize of output 19 [2021-06-05 14:28:38,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:38,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:38,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,654 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 26 treesize of output 20 [2021-06-05 14:28:38,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,660 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 28 treesize of output 22 [2021-06-05 14:28:38,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,666 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 [2021-06-05 14:28:38,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:38,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:38,679 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:28:38,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,690 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 26 treesize of output 20 [2021-06-05 14:28:38,691 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,696 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 16 treesize of output 12 [2021-06-05 14:28:38,696 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,701 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 28 treesize of output 22 [2021-06-05 14:28:38,702 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,707 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 27 treesize of output 21 [2021-06-05 14:28:38,708 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,865 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-05 14:28:38,866 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:28:38,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,870 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 20 treesize of output 9 [2021-06-05 14:28:38,870 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:38,874 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 20 treesize of output 9 [2021-06-05 14:28:38,874 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:38,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:38,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:28:38,932 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:28:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:39,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472111071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:39,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:39,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:39,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944890895] [2021-06-05 14:28:39,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:39,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:39,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:39,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:39,019 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) [2021-06-05 14:28:39,575 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 14:28:40,037 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 14:28:40,606 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 111 [2021-06-05 14:28:40,829 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 14:28:41,099 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 14:28:41,334 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-05 14:28:41,621 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-06-05 14:28:41,788 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 14:28:41,994 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 14:28:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:42,070 INFO L93 Difference]: Finished difference Result 659 states and 2036 transitions. [2021-06-05 14:28:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:28:42,070 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 [2021-06-05 14:28:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:42,071 INFO L225 Difference]: With dead ends: 659 [2021-06-05 14:28:42,071 INFO L226 Difference]: Without dead ends: 639 [2021-06-05 14:28:42,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3036.8ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:28:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-05 14:28:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 425. [2021-06-05 14:28:42,075 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) [2021-06-05 14:28:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1373 transitions. [2021-06-05 14:28:42,076 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1373 transitions. Word has length 18 [2021-06-05 14:28:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:42,076 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1373 transitions. [2021-06-05 14:28:42,076 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) [2021-06-05 14:28:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1373 transitions. [2021-06-05 14:28:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:42,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:42,077 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:42,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7449 [2021-06-05 14:28:42,277 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 350513638, now seen corresponding path program 284 times [2021-06-05 14:28:42,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:42,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381683639] [2021-06-05 14:28:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:42,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381683639] [2021-06-05 14:28:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381683639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462435457] [2021-06-05 14:28:42,503 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 [2021-06-05 14:28:42,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:42,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:42,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,579 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 [2021-06-05 14:28:42,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,582 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 [2021-06-05 14:28:42,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:42,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,588 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 17 treesize of output 13 [2021-06-05 14:28:42,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,616 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-05 14:28:42,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:42,617 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-05 14:28:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,694 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 17 treesize of output 13 [2021-06-05 14:28:42,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,698 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 25 treesize of output 19 [2021-06-05 14:28:42,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,702 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 [2021-06-05 14:28:42,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:42,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:42,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,711 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 [2021-06-05 14:28:42,712 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:42,779 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-05 14:28:42,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:42,782 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 [2021-06-05 14:28:42,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,784 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 [2021-06-05 14:28:42,785 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:42,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:42,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:42,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:42,817 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:28:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:42,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462435457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:42,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:42,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608341675] [2021-06-05 14:28:42,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:42,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:42,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:42,923 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) [2021-06-05 14:28:43,598 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 14:28:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:43,837 INFO L93 Difference]: Finished difference Result 572 states and 1761 transitions. [2021-06-05 14:28:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:43,838 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 [2021-06-05 14:28:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:43,839 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:28:43,839 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 14:28:43,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 907.2ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:28:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 14:28:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 426. [2021-06-05 14:28:43,843 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) [2021-06-05 14:28:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-06-05 14:28:43,844 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-06-05 14:28:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:43,844 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-06-05 14:28:43,844 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) [2021-06-05 14:28:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-06-05 14:28:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:43,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:43,844 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:44,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7479,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:44,045 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1415193868, now seen corresponding path program 285 times [2021-06-05 14:28:44,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:44,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074738859] [2021-06-05 14:28:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:44,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074738859] [2021-06-05 14:28:44,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074738859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910431433] [2021-06-05 14:28:44,360 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 [2021-06-05 14:28:44,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:28:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:44,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:44,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,444 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 [2021-06-05 14:28:44,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:44,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,451 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 25 treesize of output 19 [2021-06-05 14:28:44,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,454 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 16 treesize of output 12 [2021-06-05 14:28:44,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,523 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:28:44,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:44,524 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:28:44,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:44,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,649 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 16 treesize of output 12 [2021-06-05 14:28:44,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,653 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 18 treesize of output 14 [2021-06-05 14:28:44,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:44,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,661 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 27 treesize of output 21 [2021-06-05 14:28:44,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:44,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:44,669 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,767 INFO L628 ElimStorePlain]: treesize reduction 83, result has 49.4 percent of original size [2021-06-05 14:28:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,771 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 11 treesize of output 3 [2021-06-05 14:28:44,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:44,774 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 21 treesize of output 7 [2021-06-05 14:28:44,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:44,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:44,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:44,808 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-06-05 14:28:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:44,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910431433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:44,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:44,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169802835] [2021-06-05 14:28:44,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:44,922 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) [2021-06-05 14:28:45,447 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 14:28:45,669 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 14:28:45,883 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 14:28:46,095 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 14:28:46,355 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 14:28:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:46,469 INFO L93 Difference]: Finished difference Result 550 states and 1707 transitions. [2021-06-05 14:28:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:28:46,469 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 [2021-06-05 14:28:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:46,470 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:28:46,470 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 14:28:46,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1616.9ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:28:46,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 14:28:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 428. [2021-06-05 14:28:46,474 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) [2021-06-05 14:28:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1385 transitions. [2021-06-05 14:28:46,475 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1385 transitions. Word has length 18 [2021-06-05 14:28:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:46,475 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1385 transitions. [2021-06-05 14:28:46,475 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) [2021-06-05 14:28:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1385 transitions. [2021-06-05 14:28:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:46,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:46,476 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:46,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7492,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:46,676 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1953749984, now seen corresponding path program 286 times [2021-06-05 14:28:46,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:46,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989056527] [2021-06-05 14:28:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:46,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989056527] [2021-06-05 14:28:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989056527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141149839] [2021-06-05 14:28:46,876 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 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 [2021-06-05 14:28:46,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:46,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:46,958 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 15 treesize of output 11 [2021-06-05 14:28:46,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:46,961 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 34 treesize of output 26 [2021-06-05 14:28:46,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:46,964 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 35 treesize of output 27 [2021-06-05 14:28:46,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:46,968 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 25 treesize of output 19 [2021-06-05 14:28:46,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:46,972 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 25 treesize of output 19 [2021-06-05 14:28:46,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:46,975 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 24 treesize of output 18 [2021-06-05 14:28:46,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,086 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:28:47,086 INFO L628 ElimStorePlain]: treesize reduction 56, result has 78.4 percent of original size [2021-06-05 14:28:47,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:47,088 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-05 14:28:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:47,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:28:47,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,276 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 28 treesize of output 22 [2021-06-05 14:28:47,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,281 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 [2021-06-05 14:28:47,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,286 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 15 treesize of output 11 [2021-06-05 14:28:47,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,291 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 [2021-06-05 14:28:47,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,296 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 25 treesize of output 19 [2021-06-05 14:28:47,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,308 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 26 treesize of output 20 [2021-06-05 14:28:47,309 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,312 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 46 treesize of output 36 [2021-06-05 14:28:47,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:47,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,321 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 45 treesize of output 35 [2021-06-05 14:28:47,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,326 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 16 treesize of output 12 [2021-06-05 14:28:47,326 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:28:47,331 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:47,334 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,416 INFO L628 ElimStorePlain]: treesize reduction 243, result has 24.8 percent of original size [2021-06-05 14:28:47,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,419 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 10 treesize of output 5 [2021-06-05 14:28:47,420 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:47,422 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 10 treesize of output 5 [2021-06-05 14:28:47,423 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:47,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:47,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:47,450 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:611, output treesize:70 [2021-06-05 14:28:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:47,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141149839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:47,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:47,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863314220] [2021-06-05 14:28:47,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:47,566 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) [2021-06-05 14:28:48,073 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 14:28:48,594 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 14:28:49,027 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-05 14:28:49,322 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 14:28:49,529 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 14:28:49,690 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 14:28:49,873 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 14:28:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:49,951 INFO L93 Difference]: Finished difference Result 679 states and 2103 transitions. [2021-06-05 14:28:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:28:49,951 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 [2021-06-05 14:28:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:49,952 INFO L225 Difference]: With dead ends: 679 [2021-06-05 14:28:49,952 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 14:28:49,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2190.5ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:28:49,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 14:28:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 426. [2021-06-05 14:28:49,957 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) [2021-06-05 14:28:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-06-05 14:28:49,957 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-06-05 14:28:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:49,958 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-06-05 14:28:49,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:28:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-06-05 14:28:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:49,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:49,958 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:50,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7503,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:50,159 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1498526464, now seen corresponding path program 287 times [2021-06-05 14:28:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:50,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554537190] [2021-06-05 14:28:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:50,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554537190] [2021-06-05 14:28:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554537190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914725081] [2021-06-05 14:28:50,367 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 [2021-06-05 14:28:50,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:28:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:50,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,448 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 16 treesize of output 12 [2021-06-05 14:28:50,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,452 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 26 treesize of output 20 [2021-06-05 14:28:50,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,456 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 [2021-06-05 14:28:50,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,459 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 [2021-06-05 14:28:50,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:28:50,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,525 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:50,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:50,526 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:50,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,636 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 35 treesize of output 27 [2021-06-05 14:28:50,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:50,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:50,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,646 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 16 treesize of output 12 [2021-06-05 14:28:50,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,650 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 15 treesize of output 11 [2021-06-05 14:28:50,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,654 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 25 treesize of output 19 [2021-06-05 14:28:50,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,658 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 [2021-06-05 14:28:50,659 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,662 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 26 treesize of output 20 [2021-06-05 14:28:50,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,733 INFO L628 ElimStorePlain]: treesize reduction 198, result has 29.5 percent of original size [2021-06-05 14:28:50,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:50,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,739 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 [2021-06-05 14:28:50,740 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:50,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:50,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:50,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:50,777 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-06-05 14:28:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:50,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914725081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:50,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:50,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:28:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845624892] [2021-06-05 14:28:50,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:50,886 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) [2021-06-05 14:28:51,389 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 14:28:51,572 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-05 14:28:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:51,635 INFO L93 Difference]: Finished difference Result 536 states and 1675 transitions. [2021-06-05 14:28:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:51,635 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 [2021-06-05 14:28:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:51,636 INFO L225 Difference]: With dead ends: 536 [2021-06-05 14:28:51,636 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 14:28:51,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 14:28:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2021-06-05 14:28:51,640 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) [2021-06-05 14:28:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1379 transitions. [2021-06-05 14:28:51,641 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1379 transitions. Word has length 18 [2021-06-05 14:28:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:51,641 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1379 transitions. [2021-06-05 14:28:51,641 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) [2021-06-05 14:28:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1379 transitions. [2021-06-05 14:28:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:51,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:51,641 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:51,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7526,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:51,842 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:51,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1558536974, now seen corresponding path program 288 times [2021-06-05 14:28:51,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:51,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629826432] [2021-06-05 14:28:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:52,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:52,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629826432] [2021-06-05 14:28:52,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629826432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:52,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847202513] [2021-06-05 14:28:52,053 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 [2021-06-05 14:28:52,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:28:52,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:52,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:52,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,122 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 16 treesize of output 12 [2021-06-05 14:28:52,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:52,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,128 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 26 treesize of output 20 [2021-06-05 14:28:52,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:52,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:52,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,138 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 24 treesize of output 18 [2021-06-05 14:28:52,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,199 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:52,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:52,200 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:28:52,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,322 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 15 treesize of output 11 [2021-06-05 14:28:52,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:28:52,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,332 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 25 treesize of output 19 [2021-06-05 14:28:52,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,338 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 [2021-06-05 14:28:52,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:52,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,348 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 35 treesize of output 27 [2021-06-05 14:28:52,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-05 14:28:52,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:52,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,437 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-06-05 14:28:52,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,441 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 [2021-06-05 14:28:52,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:52,445 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 21 treesize of output 7 [2021-06-05 14:28:52,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:52,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:52,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:52,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:28:52,485 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-06-05 14:28:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847202513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:52,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:52,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:52,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971156861] [2021-06-05 14:28:52,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:52,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:52,625 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) [2021-06-05 14:28:53,147 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:28:53,364 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 14:28:53,565 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 14:28:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:53,785 INFO L93 Difference]: Finished difference Result 552 states and 1723 transitions. [2021-06-05 14:28:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:28:53,786 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 [2021-06-05 14:28:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:53,786 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:28:53,786 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:28:53,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:28:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:28:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 423. [2021-06-05 14:28:53,791 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) [2021-06-05 14:28:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1366 transitions. [2021-06-05 14:28:53,791 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1366 transitions. Word has length 18 [2021-06-05 14:28:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:53,791 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1366 transitions. [2021-06-05 14:28:53,791 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) [2021-06-05 14:28:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1366 transitions. [2021-06-05 14:28:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:53,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:53,792 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:53,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7539 [2021-06-05 14:28:53,992 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1921396440, now seen corresponding path program 289 times [2021-06-05 14:28:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:53,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172828735] [2021-06-05 14:28:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:54,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:54,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172828735] [2021-06-05 14:28:54,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172828735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:54,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818306126] [2021-06-05 14:28:54,143 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 [2021-06-05 14:28:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:54,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:54,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:28:54,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:28:54,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,324 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 16 treesize of output 12 [2021-06-05 14:28:54,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,327 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 25 treesize of output 19 [2021-06-05 14:28:54,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,330 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 26 treesize of output 20 [2021-06-05 14:28:54,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,388 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:28:54,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:54,389 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-06-05 14:28:54,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:28:54,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,448 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 [2021-06-05 14:28:54,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,499 INFO L628 ElimStorePlain]: treesize reduction 92, result has 43.6 percent of original size [2021-06-05 14:28:54,500 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1900 vanished before elimination [2021-06-05 14:28:54,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,502 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 [2021-06-05 14:28:54,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:54,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,530 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 11 treesize of output 3 [2021-06-05 14:28:54,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:54,533 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 21 treesize of output 7 [2021-06-05 14:28:54,534 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,565 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 [2021-06-05 14:28:54,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:54,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:54,587 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1898 vanished before elimination [2021-06-05 14:28:54,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:54,588 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-06-05 14:28:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:54,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818306126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:54,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:54,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565715625] [2021-06-05 14:28:54,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:54,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:54,652 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) [2021-06-05 14:28:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:55,258 INFO L93 Difference]: Finished difference Result 539 states and 1643 transitions. [2021-06-05 14:28:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:55,259 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 [2021-06-05 14:28:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:55,259 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:28:55,259 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:28:55,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:28:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:28:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 419. [2021-06-05 14:28:55,263 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) [2021-06-05 14:28:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1356 transitions. [2021-06-05 14:28:55,264 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1356 transitions. Word has length 18 [2021-06-05 14:28:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:55,264 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1356 transitions. [2021-06-05 14:28:55,264 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) [2021-06-05 14:28:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1356 transitions. [2021-06-05 14:28:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:55,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:55,265 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:55,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7550,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:55,465 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:55,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1307733628, now seen corresponding path program 290 times [2021-06-05 14:28:55,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:55,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649255120] [2021-06-05 14:28:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:55,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:55,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649255120] [2021-06-05 14:28:55,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649255120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:55,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565526438] [2021-06-05 14:28:55,595 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 [2021-06-05 14:28:55,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:55,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:28:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:55,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:28:55,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:55,709 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 25 treesize of output 19 [2021-06-05 14:28:55,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:55,712 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 24 treesize of output 18 [2021-06-05 14:28:55,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:55,760 INFO L628 ElimStorePlain]: treesize reduction 36, result has 64.0 percent of original size [2021-06-05 14:28:55,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:55,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:64 [2021-06-05 14:28:55,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:55,874 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 [2021-06-05 14:28:55,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:55,896 INFO L628 ElimStorePlain]: treesize reduction 55, result has 40.2 percent of original size [2021-06-05 14:28:55,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:55,898 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 [2021-06-05 14:28:55,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:55,916 INFO L628 ElimStorePlain]: treesize reduction 23, result has 52.1 percent of original size [2021-06-05 14:28:55,916 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1904 vanished before elimination [2021-06-05 14:28:55,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:55,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:28:55,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:55,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:55,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:55,925 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:99, output treesize:11 [2021-06-05 14:28:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:55,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565526438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:55,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:55,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:55,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692768257] [2021-06-05 14:28:55,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:55,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:55,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:55,946 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) [2021-06-05 14:28:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:56,444 INFO L93 Difference]: Finished difference Result 503 states and 1588 transitions. [2021-06-05 14:28:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:28:56,444 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 [2021-06-05 14:28:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:56,445 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:28:56,445 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:28:56,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:28:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:28:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 415. [2021-06-05 14:28:56,449 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) [2021-06-05 14:28:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1345 transitions. [2021-06-05 14:28:56,450 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1345 transitions. Word has length 18 [2021-06-05 14:28:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:56,450 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1345 transitions. [2021-06-05 14:28:56,450 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) [2021-06-05 14:28:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1345 transitions. [2021-06-05 14:28:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:56,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:56,450 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:56,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7562 [2021-06-05 14:28:56,651 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash 173504242, now seen corresponding path program 291 times [2021-06-05 14:28:56,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:56,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26893883] [2021-06-05 14:28:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:56,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26893883] [2021-06-05 14:28:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26893883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285224865] [2021-06-05 14:28:56,773 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 [2021-06-05 14:28:56,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:28:56,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:56,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,885 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 19 treesize of output 13 [2021-06-05 14:28:56,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:28:56,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:56,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:56,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:85, output treesize:69 [2021-06-05 14:28:56,962 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-05 14:28:56,968 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 25 treesize of output 19 [2021-06-05 14:28:56,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,971 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 15 treesize of output 11 [2021-06-05 14:28:56,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:28:56,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:56,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:28:56,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:57,030 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.5 percent of original size [2021-06-05 14:28:57,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,033 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 [2021-06-05 14:28:57,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:57,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:28:57,037 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:57,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:57,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:28:57,068 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:149, output treesize:38 [2021-06-05 14:28:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:57,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285224865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:57,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:57,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:28:57,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519462819] [2021-06-05 14:28:57,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:28:57,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:28:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:28:57,127 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) [2021-06-05 14:28:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:57,628 INFO L93 Difference]: Finished difference Result 483 states and 1534 transitions. [2021-06-05 14:28:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:28:57,628 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 [2021-06-05 14:28:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:57,629 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:28:57,629 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 14:28:57,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:28:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 14:28:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 402. [2021-06-05 14:28:57,633 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) [2021-06-05 14:28:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-06-05 14:28:57,633 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-06-05 14:28:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:57,633 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-06-05 14:28:57,633 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) [2021-06-05 14:28:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-06-05 14:28:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:57,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:57,634 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:57,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7573 [2021-06-05 14:28:57,834 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 874568820, now seen corresponding path program 292 times [2021-06-05 14:28:57,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:57,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329247178] [2021-06-05 14:28:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:58,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:58,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329247178] [2021-06-05 14:28:58,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329247178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:58,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394697243] [2021-06-05 14:28:58,037 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 [2021-06-05 14:28:58,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:28:58,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:58,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,151 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 [2021-06-05 14:28:58,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,155 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 26 treesize of output 20 [2021-06-05 14:28:58,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:58,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,161 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 16 treesize of output 12 [2021-06-05 14:28:58,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,237 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-05 14:28:58,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:58,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-05 14:28:58,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,377 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 25 treesize of output 19 [2021-06-05 14:28:58,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,382 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 [2021-06-05 14:28:58,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:58,444 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.2 percent of original size [2021-06-05 14:28:58,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:28:58,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,462 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 7 treesize of output 5 [2021-06-05 14:28:58,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,492 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1906 vanished before elimination [2021-06-05 14:28:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,495 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 11 treesize of output 3 [2021-06-05 14:28:58,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:28:58,499 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 [2021-06-05 14:28:58,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:58,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:28:58,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:28:58,534 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:183, output treesize:56 [2021-06-05 14:28:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:58,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394697243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:58,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:28:58,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:28:58,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143510854] [2021-06-05 14:28:58,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:28:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:28:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:28:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:28:58,616 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) [2021-06-05 14:28:59,094 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 14:28:59,281 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 14:28:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:28:59,515 INFO L93 Difference]: Finished difference Result 462 states and 1465 transitions. [2021-06-05 14:28:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:28:59,516 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 [2021-06-05 14:28:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:28:59,516 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:28:59,516 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:28:59,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 989.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:28:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:28:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 402. [2021-06-05 14:28:59,520 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) [2021-06-05 14:28:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-06-05 14:28:59,521 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-06-05 14:28:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:28:59,521 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-06-05 14:28:59,521 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) [2021-06-05 14:28:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-06-05 14:28:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:28:59,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:28:59,522 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:28:59,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7582,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:28:59,722 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:28:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:28:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2069604994, now seen corresponding path program 293 times [2021-06-05 14:28:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:28:59,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944537883] [2021-06-05 14:28:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:28:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:28:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:28:59,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:28:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944537883] [2021-06-05 14:28:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944537883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:28:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258854621] [2021-06-05 14:28:59,891 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 [2021-06-05 14:28:59,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:28:59,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:28:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:28:59,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:28:59,978 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 15 treesize of output 11 [2021-06-05 14:28:59,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:28:59,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:28:59,985 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 27 treesize of output 21 [2021-06-05 14:28:59,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:28:59,989 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 17 treesize of output 13 [2021-06-05 14:28:59,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:00,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:00,029 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:131 [2021-06-05 14:29:00,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:00,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,116 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 18 treesize of output 14 [2021-06-05 14:29:00,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,120 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 18 treesize of output 14 [2021-06-05 14:29:00,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,125 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 [2021-06-05 14:29:00,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:00,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,132 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 [2021-06-05 14:29:00,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,136 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 25 treesize of output 19 [2021-06-05 14:29:00,137 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:00,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:00,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:00,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,212 INFO L628 ElimStorePlain]: treesize reduction 64, result has 57.6 percent of original size [2021-06-05 14:29:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,215 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 10 treesize of output 5 [2021-06-05 14:29:00,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:00,218 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 20 treesize of output 9 [2021-06-05 14:29:00,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:00,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:00,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:00,258 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:367, output treesize:71 [2021-06-05 14:29:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:00,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258854621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:00,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:00,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895338679] [2021-06-05 14:29:00,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:00,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:00,359 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) [2021-06-05 14:29:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:00,777 INFO L93 Difference]: Finished difference Result 470 states and 1488 transitions. [2021-06-05 14:29:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:00,777 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 [2021-06-05 14:29:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:00,778 INFO L225 Difference]: With dead ends: 470 [2021-06-05 14:29:00,778 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 14:29:00,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:29:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 14:29:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 405. [2021-06-05 14:29:00,782 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) [2021-06-05 14:29:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-06-05 14:29:00,782 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-06-05 14:29:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:00,782 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-06-05 14:29:00,782 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) [2021-06-05 14:29:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-06-05 14:29:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:00,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:00,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:00,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7593 [2021-06-05 14:29:00,983 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash 129616248, now seen corresponding path program 294 times [2021-06-05 14:29:00,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:00,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305820973] [2021-06-05 14:29:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:01,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:01,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305820973] [2021-06-05 14:29:01,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305820973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:01,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745310405] [2021-06-05 14:29:01,179 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 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 [2021-06-05 14:29:01,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:29:01,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:01,294 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 24 treesize of output 18 [2021-06-05 14:29:01,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:01,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:29:01,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:01,305 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 34 treesize of output 26 [2021-06-05 14:29:01,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,309 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 [2021-06-05 14:29:01,309 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,312 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 15 treesize of output 11 [2021-06-05 14:29:01,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,440 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 14:29:01,440 INFO L628 ElimStorePlain]: treesize reduction 68, result has 76.0 percent of original size [2021-06-05 14:29:01,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:01,442 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:247, output treesize:215 [2021-06-05 14:29:01,706 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 14:29:01,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:01,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,840 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 16 treesize of output 12 [2021-06-05 14:29:01,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,846 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 28 treesize of output 22 [2021-06-05 14:29:01,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,852 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 26 treesize of output 20 [2021-06-05 14:29:01,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,858 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 [2021-06-05 14:29:01,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,864 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 [2021-06-05 14:29:01,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,869 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 15 treesize of output 11 [2021-06-05 14:29:01,870 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,875 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 [2021-06-05 14:29:01,876 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,881 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 15 treesize of output 11 [2021-06-05 14:29:01,882 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,887 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 27 treesize of output 21 [2021-06-05 14:29:01,888 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,892 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 28 treesize of output 22 [2021-06-05 14:29:01,893 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,898 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 [2021-06-05 14:29:01,899 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,904 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 16 treesize of output 12 [2021-06-05 14:29:01,904 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:01,909 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 26 treesize of output 20 [2021-06-05 14:29:01,909 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,058 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-05 14:29:02,058 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:29:02,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,063 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 [2021-06-05 14:29:02,063 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:02,067 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 20 treesize of output 9 [2021-06-05 14:29:02,068 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:02,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:02,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:29:02,125 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:29:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745310405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:02,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:02,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:02,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024383013] [2021-06-05 14:29:02,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:02,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:02,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:02,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:02,211 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) [2021-06-05 14:29:02,654 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 14:29:02,951 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-05 14:29:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:03,247 INFO L93 Difference]: Finished difference Result 488 states and 1537 transitions. [2021-06-05 14:29:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:03,248 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 [2021-06-05 14:29:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:03,249 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:29:03,249 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 14:29:03,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1201.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:29:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 14:29:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 400. [2021-06-05 14:29:03,252 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) [2021-06-05 14:29:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1295 transitions. [2021-06-05 14:29:03,253 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1295 transitions. Word has length 18 [2021-06-05 14:29:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:03,253 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1295 transitions. [2021-06-05 14:29:03,253 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) [2021-06-05 14:29:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1295 transitions. [2021-06-05 14:29:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:03,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:03,253 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:03,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7610 [2021-06-05 14:29:03,454 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash 722420652, now seen corresponding path program 295 times [2021-06-05 14:29:03,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:03,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117159655] [2021-06-05 14:29:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:03,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:03,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117159655] [2021-06-05 14:29:03,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117159655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:03,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356086266] [2021-06-05 14:29:03,620 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 [2021-06-05 14:29:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:03,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:03,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,731 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 18 [2021-06-05 14:29:03,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,735 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 26 treesize of output 20 [2021-06-05 14:29:03,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,739 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 16 treesize of output 12 [2021-06-05 14:29:03,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,743 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 25 treesize of output 19 [2021-06-05 14:29:03,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:03,747 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 15 treesize of output 11 [2021-06-05 14:29:03,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:03,833 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-05 14:29:03,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:03,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-05 14:29:04,068 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1920], 1=[array_0, v_prenex_1919]} [2021-06-05 14:29:04,071 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 [2021-06-05 14:29:04,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,074 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 15 treesize of output 11 [2021-06-05 14:29:04,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,105 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:29:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:04,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:04,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,123 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:29:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,126 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 11 treesize of output 3 [2021-06-05 14:29:04,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:04,128 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 [2021-06-05 14:29:04,129 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:04,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:04,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:04,150 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:29:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:04,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356086266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:04,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:04,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:29:04,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146217608] [2021-06-05 14:29:04,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:04,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:04,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:04,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:04,171 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) [2021-06-05 14:29:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:04,755 INFO L93 Difference]: Finished difference Result 462 states and 1463 transitions. [2021-06-05 14:29:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:29:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:04,756 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:29:04,756 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:29:04,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:29:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 403. [2021-06-05 14:29:04,759 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) [2021-06-05 14:29:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-06-05 14:29:04,760 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-06-05 14:29:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:04,760 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-06-05 14:29:04,760 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) [2021-06-05 14:29:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-06-05 14:29:04,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:04,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:04,761 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:04,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7628 [2021-06-05 14:29:04,961 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:04,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568094, now seen corresponding path program 296 times [2021-06-05 14:29:04,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:04,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436359241] [2021-06-05 14:29:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:05,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:05,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436359241] [2021-06-05 14:29:05,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436359241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:05,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672092661] [2021-06-05 14:29:05,114 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 [2021-06-05 14:29:05,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:05,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:05,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:29:05,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:05,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,221 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 18 treesize of output 14 [2021-06-05 14:29:05,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:05,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,270 INFO L628 ElimStorePlain]: treesize reduction 28, result has 69.2 percent of original size [2021-06-05 14:29:05,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:05,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:29:05,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:05,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,436 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 [2021-06-05 14:29:05,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:05,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,444 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 [2021-06-05 14:29:05,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:05,521 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-05 14:29:05,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:29:05,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:05,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:05,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:05,539 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 9 treesize of output 3 [2021-06-05 14:29:05,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:05,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:05,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:05,573 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-05 14:29:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:05,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672092661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:05,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:05,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:05,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156434051] [2021-06-05 14:29:05,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:05,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:05,651 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) [2021-06-05 14:29:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:06,249 INFO L93 Difference]: Finished difference Result 476 states and 1507 transitions. [2021-06-05 14:29:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:29:06,249 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 [2021-06-05 14:29:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:06,250 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:29:06,250 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:29:06,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:29:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:29:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 401. [2021-06-05 14:29:06,254 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) [2021-06-05 14:29:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1297 transitions. [2021-06-05 14:29:06,254 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1297 transitions. Word has length 18 [2021-06-05 14:29:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:06,254 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1297 transitions. [2021-06-05 14:29:06,254 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) [2021-06-05 14:29:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1297 transitions. [2021-06-05 14:29:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:06,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:06,255 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:06,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:06,455 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:06,455 INFO L82 PathProgramCache]: Analyzing trace with hash -92385502, now seen corresponding path program 297 times [2021-06-05 14:29:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:06,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973834379] [2021-06-05 14:29:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:06,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973834379] [2021-06-05 14:29:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973834379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160205462] [2021-06-05 14:29:06,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:29:06,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:29:06,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:06,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,772 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 17 treesize of output 13 [2021-06-05 14:29:06,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,776 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 18 treesize of output 14 [2021-06-05 14:29:06,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:06,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:06,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,840 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-05 14:29:06,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:06,841 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:29:06,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:06,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:06,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:06,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:06,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:06,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:06,938 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 [2021-06-05 14:29:06,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:07,000 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-05 14:29:07,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:07,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:07,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,005 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 11 treesize of output 3 [2021-06-05 14:29:07,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:07,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:07,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:07,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:07,038 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:29:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:07,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160205462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:07,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:07,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:29:07,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333619477] [2021-06-05 14:29:07,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:07,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:07,148 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) [2021-06-05 14:29:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:07,894 INFO L93 Difference]: Finished difference Result 488 states and 1525 transitions. [2021-06-05 14:29:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:07,894 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 [2021-06-05 14:29:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:07,895 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:29:07,895 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:29:07,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:29:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:29:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 402. [2021-06-05 14:29:07,899 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) [2021-06-05 14:29:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1304 transitions. [2021-06-05 14:29:07,899 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1304 transitions. Word has length 18 [2021-06-05 14:29:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:07,899 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1304 transitions. [2021-06-05 14:29:07,899 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) [2021-06-05 14:29:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1304 transitions. [2021-06-05 14:29:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:07,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:07,900 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:08,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7661 [2021-06-05 14:29:08,100 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1651696552, now seen corresponding path program 298 times [2021-06-05 14:29:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:08,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968663769] [2021-06-05 14:29:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:08,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968663769] [2021-06-05 14:29:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968663769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603431218] [2021-06-05 14:29:08,333 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 [2021-06-05 14:29:08,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:08,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:08,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,448 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 [2021-06-05 14:29:08,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,451 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 26 treesize of output 20 [2021-06-05 14:29:08,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,455 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 25 treesize of output 19 [2021-06-05 14:29:08,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:29:08,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,534 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-05 14:29:08,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:08,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-05 14:29:08,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:08,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:08,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,686 INFO L628 ElimStorePlain]: treesize reduction 76, result has 58.7 percent of original size [2021-06-05 14:29:08,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1924 vanished before elimination [2021-06-05 14:29:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:08,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:08,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,730 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 18 treesize of output 14 [2021-06-05 14:29:08,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,788 INFO L628 ElimStorePlain]: treesize reduction 21, result has 79.4 percent of original size [2021-06-05 14:29:08,788 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1926 vanished before elimination [2021-06-05 14:29:08,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,791 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 11 treesize of output 3 [2021-06-05 14:29:08,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:08,794 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 21 treesize of output 7 [2021-06-05 14:29:08,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:08,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:08,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:08,827 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:229, output treesize:59 [2021-06-05 14:29:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603431218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:08,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:08,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001368293] [2021-06-05 14:29:08,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:08,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:08,938 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) [2021-06-05 14:29:09,679 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:29:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:09,846 INFO L93 Difference]: Finished difference Result 498 states and 1555 transitions. [2021-06-05 14:29:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:09,846 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 [2021-06-05 14:29:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:09,847 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:29:09,847 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:29:09,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:29:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:29:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 403. [2021-06-05 14:29:09,851 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) [2021-06-05 14:29:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-06-05 14:29:09,852 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-06-05 14:29:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:09,852 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-06-05 14:29:09,852 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) [2021-06-05 14:29:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-06-05 14:29:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:09,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:09,852 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:10,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7675,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:10,053 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1055627324, now seen corresponding path program 299 times [2021-06-05 14:29:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:10,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785027561] [2021-06-05 14:29:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:10,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785027561] [2021-06-05 14:29:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785027561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496109552] [2021-06-05 14:29:10,306 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 [2021-06-05 14:29:10,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:29:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:10,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,416 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 18 treesize of output 14 [2021-06-05 14:29:10,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:10,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,436 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 15 treesize of output 11 [2021-06-05 14:29:10,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,491 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-05 14:29:10,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:10,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-05 14:29:10,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,572 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 17 treesize of output 13 [2021-06-05 14:29:10,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,577 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 25 treesize of output 19 [2021-06-05 14:29:10,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:10,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:10,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:29:10,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:10,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:10,659 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-05 14:29:10,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:10,667 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 21 treesize of output 7 [2021-06-05 14:29:10,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,670 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 [2021-06-05 14:29:10,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:10,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:10,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:10,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:10,706 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-05 14:29:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:10,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496109552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:10,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:10,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:29:10,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933872582] [2021-06-05 14:29:10,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:29:10,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:29:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:29:10,846 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) [2021-06-05 14:29:11,529 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 14:29:11,822 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 14:29:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:11,932 INFO L93 Difference]: Finished difference Result 463 states and 1465 transitions. [2021-06-05 14:29:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:11,932 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 [2021-06-05 14:29:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:11,933 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:29:11,933 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:29:11,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1155.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:29:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:29:11,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 402. [2021-06-05 14:29:11,936 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) [2021-06-05 14:29:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1303 transitions. [2021-06-05 14:29:11,937 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1303 transitions. Word has length 18 [2021-06-05 14:29:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1303 transitions. [2021-06-05 14:29:11,937 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) [2021-06-05 14:29:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1303 transitions. [2021-06-05 14:29:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:11,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:11,938 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:12,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7687 [2021-06-05 14:29:12,138 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash 306291208, now seen corresponding path program 300 times [2021-06-05 14:29:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:12,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969419654] [2021-06-05 14:29:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:12,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:12,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969419654] [2021-06-05 14:29:12,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969419654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:12,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505954385] [2021-06-05 14:29:12,399 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 [2021-06-05 14:29:12,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:29:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,523 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 26 treesize of output 20 [2021-06-05 14:29:12,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,527 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 15 treesize of output 11 [2021-06-05 14:29:12,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:12,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,534 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 [2021-06-05 14:29:12,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,638 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 14:29:12,638 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-06-05 14:29:12,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:12,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:199, output treesize:149 [2021-06-05 14:29:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,727 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 27 treesize of output 21 [2021-06-05 14:29:12,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,732 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 [2021-06-05 14:29:12,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,850 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 14:29:12,850 INFO L628 ElimStorePlain]: treesize reduction 137, result has 54.8 percent of original size [2021-06-05 14:29:12,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,854 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 18 treesize of output 14 [2021-06-05 14:29:12,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,948 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:29:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:29:12,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:12,955 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 21 treesize of output 7 [2021-06-05 14:29:12,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:12,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:13,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1928 vanished before elimination [2021-06-05 14:29:13,011 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 7 treesize of output 5 [2021-06-05 14:29:13,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:13,082 INFO L628 ElimStorePlain]: treesize reduction 29, result has 75.4 percent of original size [2021-06-05 14:29:13,083 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1931 vanished before elimination [2021-06-05 14:29:13,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:13,084 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:299, output treesize:89 [2021-06-05 14:29:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:13,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505954385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:13,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:13,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:13,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297926562] [2021-06-05 14:29:13,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:13,233 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) [2021-06-05 14:29:13,639 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 14:29:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:13,973 INFO L93 Difference]: Finished difference Result 469 states and 1485 transitions. [2021-06-05 14:29:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:13,973 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 [2021-06-05 14:29:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:13,974 INFO L225 Difference]: With dead ends: 469 [2021-06-05 14:29:13,974 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:29:13,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:29:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 399. [2021-06-05 14:29:13,977 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) [2021-06-05 14:29:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1290 transitions. [2021-06-05 14:29:13,978 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1290 transitions. Word has length 18 [2021-06-05 14:29:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:13,978 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1290 transitions. [2021-06-05 14:29:13,978 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) [2021-06-05 14:29:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1290 transitions. [2021-06-05 14:29:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:13,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:13,979 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:14,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7701,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:14,179 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2070552084, now seen corresponding path program 301 times [2021-06-05 14:29:14,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:14,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514447828] [2021-06-05 14:29:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514447828] [2021-06-05 14:29:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514447828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664758751] [2021-06-05 14:29:14,363 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 [2021-06-05 14:29:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:14,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,482 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 [2021-06-05 14:29:14,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:14,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:14,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:14,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:14,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:14,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:14,539 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-06-05 14:29:14,893 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-05 14:29:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,898 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 15 treesize of output 11 [2021-06-05 14:29:14,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,904 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 28 treesize of output 22 [2021-06-05 14:29:14,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,910 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 18 treesize of output 14 [2021-06-05 14:29:14,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,916 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 29 treesize of output 23 [2021-06-05 14:29:14,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:29:14,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,927 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 16 treesize of output 12 [2021-06-05 14:29:14,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,932 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 19 treesize of output 15 [2021-06-05 14:29:14,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-06-05 14:29:14,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,959 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 15 treesize of output 11 [2021-06-05 14:29:14,960 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,966 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 16 treesize of output 12 [2021-06-05 14:29:14,967 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,973 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 26 treesize of output 20 [2021-06-05 14:29:14,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:14,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:14,980 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 [2021-06-05 14:29:14,981 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,191 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 14:29:15,192 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-06-05 14:29:15,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:15,197 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,202 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 11 treesize of output 3 [2021-06-05 14:29:15,203 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:15,207 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 9 treesize of output 3 [2021-06-05 14:29:15,208 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:15,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:15,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 14:29:15,294 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:105 [2021-06-05 14:29:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:15,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664758751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:15,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:15,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:15,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850220872] [2021-06-05 14:29:15,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:15,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:15,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:15,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:15,400 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) [2021-06-05 14:29:15,864 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 14:29:16,140 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-06-05 14:29:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:16,334 INFO L93 Difference]: Finished difference Result 456 states and 1442 transitions. [2021-06-05 14:29:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:16,334 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 [2021-06-05 14:29:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:16,334 INFO L225 Difference]: With dead ends: 456 [2021-06-05 14:29:16,335 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:29:16,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1145.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:29:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 402. [2021-06-05 14:29:16,338 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) [2021-06-05 14:29:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1295 transitions. [2021-06-05 14:29:16,339 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1295 transitions. Word has length 18 [2021-06-05 14:29:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:16,339 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1295 transitions. [2021-06-05 14:29:16,339 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) [2021-06-05 14:29:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1295 transitions. [2021-06-05 14:29:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:16,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:16,339 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:16,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7713,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:16,540 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:16,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1144528640, now seen corresponding path program 302 times [2021-06-05 14:29:16,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:16,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737463941] [2021-06-05 14:29:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:16,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737463941] [2021-06-05 14:29:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737463941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745766052] [2021-06-05 14:29:16,739 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 [2021-06-05 14:29:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:16,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,851 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 [2021-06-05 14:29:16,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,855 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 15 treesize of output 11 [2021-06-05 14:29:16,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,859 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 16 treesize of output 12 [2021-06-05 14:29:16,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,863 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 26 treesize of output 20 [2021-06-05 14:29:16,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,867 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 [2021-06-05 14:29:16,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:16,871 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 [2021-06-05 14:29:16,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:16,970 INFO L628 ElimStorePlain]: treesize reduction 82, result has 61.1 percent of original size [2021-06-05 14:29:16,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:16,971 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:277, output treesize:129 [2021-06-05 14:29:17,255 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1947, array_4], 6=[v_prenex_1946, array_2]} [2021-06-05 14:29:17,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,260 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 35 treesize of output 27 [2021-06-05 14:29:17,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:17,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:17,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:17,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,277 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 25 treesize of output 19 [2021-06-05 14:29:17,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,378 INFO L628 ElimStorePlain]: treesize reduction 193, result has 38.3 percent of original size [2021-06-05 14:29:17,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:29:17,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:29:17,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,424 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 [2021-06-05 14:29:17,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:17,428 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 20 treesize of output 9 [2021-06-05 14:29:17,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:17,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:17,469 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 14:29:17,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:17,471 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:278, output treesize:45 [2021-06-05 14:29:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745766052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199348235] [2021-06-05 14:29:17,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:17,534 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) [2021-06-05 14:29:17,897 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-05 14:29:18,073 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 14:29:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:18,331 INFO L93 Difference]: Finished difference Result 514 states and 1587 transitions. [2021-06-05 14:29:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:18,331 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 [2021-06-05 14:29:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:18,332 INFO L225 Difference]: With dead ends: 514 [2021-06-05 14:29:18,332 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 14:29:18,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 14:29:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 404. [2021-06-05 14:29:18,336 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) [2021-06-05 14:29:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1312 transitions. [2021-06-05 14:29:18,336 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1312 transitions. Word has length 18 [2021-06-05 14:29:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:18,336 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1312 transitions. [2021-06-05 14:29:18,336 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) [2021-06-05 14:29:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1312 transitions. [2021-06-05 14:29:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:18,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:18,337 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:18,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7731 [2021-06-05 14:29:18,537 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash 929513634, now seen corresponding path program 303 times [2021-06-05 14:29:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:18,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010424006] [2021-06-05 14:29:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:18,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010424006] [2021-06-05 14:29:18,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010424006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995288512] [2021-06-05 14:29:18,677 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 [2021-06-05 14:29:18,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:29:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,775 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 16 treesize of output 12 [2021-06-05 14:29:18,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:18,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:18,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,782 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 26 treesize of output 20 [2021-06-05 14:29:18,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:18,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:18,786 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 [2021-06-05 14:29:18,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:18,839 INFO L628 ElimStorePlain]: treesize reduction 35, result has 70.1 percent of original size [2021-06-05 14:29:18,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:18,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:82 [2021-06-05 14:29:18,998 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-05 14:29:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,002 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 34 treesize of output 26 [2021-06-05 14:29:19,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,007 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 15 treesize of output 11 [2021-06-05 14:29:19,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,012 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 25 treesize of output 19 [2021-06-05 14:29:19,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,016 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 35 treesize of output 27 [2021-06-05 14:29:19,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:19,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,022 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 [2021-06-05 14:29:19,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:19,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,105 INFO L628 ElimStorePlain]: treesize reduction 191, result has 30.5 percent of original size [2021-06-05 14:29:19,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:19,109 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:19,112 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 21 treesize of output 7 [2021-06-05 14:29:19,113 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:19,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:19,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:19,144 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:274, output treesize:55 [2021-06-05 14:29:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:19,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995288512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:19,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:19,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:19,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851509505] [2021-06-05 14:29:19,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:19,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:19,228 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) [2021-06-05 14:29:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:19,652 INFO L93 Difference]: Finished difference Result 464 states and 1487 transitions. [2021-06-05 14:29:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:19,653 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 [2021-06-05 14:29:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:19,653 INFO L225 Difference]: With dead ends: 464 [2021-06-05 14:29:19,653 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 14:29:19,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 14:29:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 398. [2021-06-05 14:29:19,657 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) [2021-06-05 14:29:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1285 transitions. [2021-06-05 14:29:19,657 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1285 transitions. Word has length 18 [2021-06-05 14:29:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:19,657 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1285 transitions. [2021-06-05 14:29:19,657 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) [2021-06-05 14:29:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1285 transitions. [2021-06-05 14:29:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:19,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:19,658 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:19,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7749,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:19,858 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1134489392, now seen corresponding path program 304 times [2021-06-05 14:29:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:19,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771938011] [2021-06-05 14:29:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771938011] [2021-06-05 14:29:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771938011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511799023] [2021-06-05 14:29:20,068 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 [2021-06-05 14:29:20,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:20,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,186 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 15 treesize of output 11 [2021-06-05 14:29:20,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,190 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 [2021-06-05 14:29:20,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,194 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 [2021-06-05 14:29:20,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,198 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 17 treesize of output 13 [2021-06-05 14:29:20,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:20,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:20,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-06-05 14:29:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,329 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 17 treesize of output 13 [2021-06-05 14:29:20,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,333 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 [2021-06-05 14:29:20,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:20,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,342 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 25 treesize of output 19 [2021-06-05 14:29:20,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:20,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:20,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,353 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 19 treesize of output 15 [2021-06-05 14:29:20,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:20,357 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:20,361 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:20,364 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,452 INFO L628 ElimStorePlain]: treesize reduction 110, result has 49.8 percent of original size [2021-06-05 14:29:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,455 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 11 treesize of output 3 [2021-06-05 14:29:20,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:20,458 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 21 treesize of output 7 [2021-06-05 14:29:20,459 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:20,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:20,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:20,493 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-06-05 14:29:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511799023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:20,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:20,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627291199] [2021-06-05 14:29:20,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:20,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:20,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:20,660 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) [2021-06-05 14:29:21,083 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 14:29:21,393 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 14:29:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:21,469 INFO L93 Difference]: Finished difference Result 455 states and 1437 transitions. [2021-06-05 14:29:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:21,470 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 [2021-06-05 14:29:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:21,470 INFO L225 Difference]: With dead ends: 455 [2021-06-05 14:29:21,470 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:29:21,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 988.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:29:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 397. [2021-06-05 14:29:21,474 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) [2021-06-05 14:29:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-06-05 14:29:21,475 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-06-05 14:29:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:21,475 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-06-05 14:29:21,475 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) [2021-06-05 14:29:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-06-05 14:29:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:21,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:21,475 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:21,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7760 [2021-06-05 14:29:21,676 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1272097146, now seen corresponding path program 305 times [2021-06-05 14:29:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:21,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018218863] [2021-06-05 14:29:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:21,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:21,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018218863] [2021-06-05 14:29:21,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018218863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:21,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336090200] [2021-06-05 14:29:21,845 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 [2021-06-05 14:29:21,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,944 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 [2021-06-05 14:29:21,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,948 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 [2021-06-05 14:29:21,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:21,952 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 15 treesize of output 11 [2021-06-05 14:29:21,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:21,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:21,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,005 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-06-05 14:29:22,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:22,006 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-06-05 14:29:22,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:29:22,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,065 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 15 treesize of output 11 [2021-06-05 14:29:22,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:22,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,072 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 18 treesize of output 14 [2021-06-05 14:29:22,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,076 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 [2021-06-05 14:29:22,077 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:22,080 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,084 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 [2021-06-05 14:29:22,085 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:22,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,089 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 34 treesize of output 26 [2021-06-05 14:29:22,090 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:22,094 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,175 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-06-05 14:29:22,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:22,179 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:22,182 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 21 treesize of output 7 [2021-06-05 14:29:22,182 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:22,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:22,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:22,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:22,218 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-06-05 14:29:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:22,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336090200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:22,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:22,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:22,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333372376] [2021-06-05 14:29:22,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:22,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:22,358 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) [2021-06-05 14:29:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:22,819 INFO L93 Difference]: Finished difference Result 466 states and 1466 transitions. [2021-06-05 14:29:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:22,819 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 [2021-06-05 14:29:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:22,820 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:29:22,820 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:29:22,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:29:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 397. [2021-06-05 14:29:22,823 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) [2021-06-05 14:29:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-06-05 14:29:22,824 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-06-05 14:29:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:22,824 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-06-05 14:29:22,824 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) [2021-06-05 14:29:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-06-05 14:29:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:22,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:22,825 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:23,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7774 [2021-06-05 14:29:23,025 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1661314044, now seen corresponding path program 306 times [2021-06-05 14:29:23,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:23,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224443623] [2021-06-05 14:29:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:23,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:23,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224443623] [2021-06-05 14:29:23,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224443623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:23,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080551664] [2021-06-05 14:29:23,214 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 [2021-06-05 14:29:23,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:29:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:23,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,310 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 26 treesize of output 20 [2021-06-05 14:29:23,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,313 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 25 treesize of output 19 [2021-06-05 14:29:23,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:23,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:23,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,370 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-06-05 14:29:23,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:23,371 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-06-05 14:29:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:29:23,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,431 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 [2021-06-05 14:29:23,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:23,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 14:29:23,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,443 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 25 treesize of output 19 [2021-06-05 14:29:23,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:23,447 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,450 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 35 treesize of output 27 [2021-06-05 14:29:23,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:23,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,455 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 34 treesize of output 26 [2021-06-05 14:29:23,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,459 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 [2021-06-05 14:29:23,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,541 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-06-05 14:29:23,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,544 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 21 treesize of output 7 [2021-06-05 14:29:23,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:23,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:23,548 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:23,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:23,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:23,584 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-06-05 14:29:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:23,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080551664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:23,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:23,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573896693] [2021-06-05 14:29:23,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:23,708 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) [2021-06-05 14:29:24,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:24,215 INFO L93 Difference]: Finished difference Result 449 states and 1423 transitions. [2021-06-05 14:29:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:24,216 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 [2021-06-05 14:29:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:24,216 INFO L225 Difference]: With dead ends: 449 [2021-06-05 14:29:24,216 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 14:29:24,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:29:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 14:29:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 397. [2021-06-05 14:29:24,220 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) [2021-06-05 14:29:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1280 transitions. [2021-06-05 14:29:24,220 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1280 transitions. Word has length 18 [2021-06-05 14:29:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:24,220 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1280 transitions. [2021-06-05 14:29:24,220 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) [2021-06-05 14:29:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1280 transitions. [2021-06-05 14:29:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:24,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:24,221 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:24,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7786 [2021-06-05 14:29:24,421 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1800492912, now seen corresponding path program 307 times [2021-06-05 14:29:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:24,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518030133] [2021-06-05 14:29:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:24,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:24,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518030133] [2021-06-05 14:29:24,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518030133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:24,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39065813] [2021-06-05 14:29:24,644 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 [2021-06-05 14:29:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:24,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,779 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 [2021-06-05 14:29:24,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,783 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 [2021-06-05 14:29:24,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,788 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 24 treesize of output 18 [2021-06-05 14:29:24,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:24,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,797 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 35 treesize of output 27 [2021-06-05 14:29:24,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:24,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:24,802 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 34 treesize of output 26 [2021-06-05 14:29:24,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:24,951 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 14:29:24,951 INFO L628 ElimStorePlain]: treesize reduction 67, result has 77.4 percent of original size [2021-06-05 14:29:24,958 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. [2021-06-05 14:29:24,958 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:262, output treesize:229 [2021-06-05 14:29:25,118 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-05 14:29:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:25,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,129 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 28 treesize of output 22 [2021-06-05 14:29:25,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:25,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,139 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 [2021-06-05 14:29:25,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:25,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,151 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 [2021-06-05 14:29:25,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,156 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 46 treesize of output 36 [2021-06-05 14:29:25,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,162 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 16 treesize of output 12 [2021-06-05 14:29:25,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 14:29:25,169 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,173 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 26 treesize of output 20 [2021-06-05 14:29:25,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:25,179 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,183 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 26 treesize of output 20 [2021-06-05 14:29:25,184 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:25,188 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:25,192 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,327 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 14:29:25,328 INFO L628 ElimStorePlain]: treesize reduction 186, result has 46.2 percent of original size [2021-06-05 14:29:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,332 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 21 treesize of output 7 [2021-06-05 14:29:25,333 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:25,336 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 7 [2021-06-05 14:29:25,337 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:25,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:25,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:29:25,390 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:689, output treesize:102 [2021-06-05 14:29:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:25,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39065813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:25,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:25,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:25,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492809750] [2021-06-05 14:29:25,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:25,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:25,541 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) [2021-06-05 14:29:26,076 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-05 14:29:26,411 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 14:29:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:26,479 INFO L93 Difference]: Finished difference Result 452 states and 1431 transitions. [2021-06-05 14:29:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:29:26,479 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 [2021-06-05 14:29:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:26,480 INFO L225 Difference]: With dead ends: 452 [2021-06-05 14:29:26,480 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:29:26,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 984.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:29:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 396. [2021-06-05 14:29:26,483 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) [2021-06-05 14:29:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1274 transitions. [2021-06-05 14:29:26,484 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1274 transitions. Word has length 18 [2021-06-05 14:29:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:26,484 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1274 transitions. [2021-06-05 14:29:26,484 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) [2021-06-05 14:29:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1274 transitions. [2021-06-05 14:29:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:26,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:26,484 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7800,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:26,685 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1262637334, now seen corresponding path program 308 times [2021-06-05 14:29:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466233537] [2021-06-05 14:29:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:26,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466233537] [2021-06-05 14:29:26,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466233537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755553048] [2021-06-05 14:29:26,839 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 [2021-06-05 14:29:26,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:29:26,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:26,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:26,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,954 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 [2021-06-05 14:29:26,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,957 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 27 treesize of output 21 [2021-06-05 14:29:26,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:26,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:26,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:26,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:26,965 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 25 treesize of output 19 [2021-06-05 14:29:26,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:27,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:27,005 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-05 14:29:27,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,090 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 [2021-06-05 14:29:27,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,094 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 [2021-06-05 14:29:27,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,098 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 28 treesize of output 22 [2021-06-05 14:29:27,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,102 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 29 treesize of output 23 [2021-06-05 14:29:27,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:27,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:27,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:27,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:27,115 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,119 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 19 treesize of output 15 [2021-06-05 14:29:27,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:27,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,192 INFO L628 ElimStorePlain]: treesize reduction 64, result has 58.2 percent of original size [2021-06-05 14:29:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,196 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 11 treesize of output 3 [2021-06-05 14:29:27,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:27,199 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 21 treesize of output 7 [2021-06-05 14:29:27,199 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:27,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:27,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:27,229 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-05 14:29:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:27,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755553048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:27,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:27,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337981] [2021-06-05 14:29:27,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:27,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:27,346 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) [2021-06-05 14:29:27,728 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 14:29:27,909 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 14:29:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:28,221 INFO L93 Difference]: Finished difference Result 462 states and 1457 transitions. [2021-06-05 14:29:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:29:28,221 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 [2021-06-05 14:29:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:28,222 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:29:28,222 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:29:28,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 892.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:29:28,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 393. [2021-06-05 14:29:28,226 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) [2021-06-05 14:29:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1265 transitions. [2021-06-05 14:29:28,226 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1265 transitions. Word has length 18 [2021-06-05 14:29:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:28,226 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1265 transitions. [2021-06-05 14:29:28,226 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) [2021-06-05 14:29:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1265 transitions. [2021-06-05 14:29:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:28,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:28,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:28,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7825,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:28,427 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1966146404, now seen corresponding path program 309 times [2021-06-05 14:29:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:28,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208125672] [2021-06-05 14:29:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:28,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:28,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208125672] [2021-06-05 14:29:28,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208125672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:28,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805535626] [2021-06-05 14:29:28,545 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 [2021-06-05 14:29:28,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:29:28,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:28,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,648 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 [2021-06-05 14:29:28,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,651 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 25 treesize of output 19 [2021-06-05 14:29:28,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:29:28,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,659 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 15 treesize of output 11 [2021-06-05 14:29:28,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,711 INFO L628 ElimStorePlain]: treesize reduction 36, result has 68.7 percent of original size [2021-06-05 14:29:28,713 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. [2021-06-05 14:29:28,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:71 [2021-06-05 14:29:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:28,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:28,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,981 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 [2021-06-05 14:29:28,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,986 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 35 treesize of output 27 [2021-06-05 14:29:28,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:28,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:28,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:28,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:28,996 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 34 treesize of output 26 [2021-06-05 14:29:28,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,093 INFO L628 ElimStorePlain]: treesize reduction 206, result has 31.3 percent of original size [2021-06-05 14:29:29,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,097 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 21 treesize of output 7 [2021-06-05 14:29:29,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:29,100 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 21 treesize of output 7 [2021-06-05 14:29:29,101 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:29,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:29,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:29,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:29:29,136 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:304, output treesize:38 [2021-06-05 14:29:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:29,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805535626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:29,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:29,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:29:29,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388766764] [2021-06-05 14:29:29,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:29:29,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:29,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:29:29,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:29:29,192 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) [2021-06-05 14:29:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:30,150 INFO L93 Difference]: Finished difference Result 562 states and 1712 transitions. [2021-06-05 14:29:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:29:30,150 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 [2021-06-05 14:29:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:30,151 INFO L225 Difference]: With dead ends: 562 [2021-06-05 14:29:30,151 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:29:30,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:29:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:29:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 400. [2021-06-05 14:29:30,155 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) [2021-06-05 14:29:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1293 transitions. [2021-06-05 14:29:30,156 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1293 transitions. Word has length 18 [2021-06-05 14:29:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:30,156 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1293 transitions. [2021-06-05 14:29:30,156 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) [2021-06-05 14:29:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1293 transitions. [2021-06-05 14:29:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:30,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:30,156 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:30,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7837 [2021-06-05 14:29:30,357 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1921892526, now seen corresponding path program 310 times [2021-06-05 14:29:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:30,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617708825] [2021-06-05 14:29:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617708825] [2021-06-05 14:29:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617708825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113050608] [2021-06-05 14:29:30,481 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 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 [2021-06-05 14:29:30,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:29:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:30,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-05 14:29:30,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 14:29:30,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 14:29:30,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-05 14:29:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:30,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,576 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 25 treesize of output 19 [2021-06-05 14:29:30,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,579 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 24 treesize of output 18 [2021-06-05 14:29:30,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:30,690 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 14:29:30,690 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-05 14:29:30,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:30,692 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-05 14:29:31,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,227 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 [2021-06-05 14:29:31,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,233 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 26 treesize of output 20 [2021-06-05 14:29:31,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,238 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 [2021-06-05 14:29:31,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:31,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 14:29:31,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:31,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,262 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 26 treesize of output 20 [2021-06-05 14:29:31,263 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:31,269 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,274 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 28 treesize of output 22 [2021-06-05 14:29:31,275 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,287 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 27 treesize of output 21 [2021-06-05 14:29:31,287 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,292 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 16 treesize of output 12 [2021-06-05 14:29:31,293 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,298 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 [2021-06-05 14:29:31,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 14:29:31,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,309 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 [2021-06-05 14:29:31,309 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,457 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-05 14:29:31,457 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-05 14:29:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:29:31,462 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2021-06-05 14:29:31,466 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:31,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:31,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:29:31,524 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-05 14:29:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:31,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113050608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:31,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:31,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:31,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171531089] [2021-06-05 14:29:31,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:31,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:31,601 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) [2021-06-05 14:29:31,808 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 14:29:32,042 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2021-06-05 14:29:32,351 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2021-06-05 14:29:32,633 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2021-06-05 14:29:32,907 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2021-06-05 14:29:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:32,945 INFO L93 Difference]: Finished difference Result 487 states and 1518 transitions. [2021-06-05 14:29:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:29:32,945 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 [2021-06-05 14:29:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:32,946 INFO L225 Difference]: With dead ends: 487 [2021-06-05 14:29:32,946 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 14:29:32,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1588.4ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:29:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 14:29:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 404. [2021-06-05 14:29:32,950 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) [2021-06-05 14:29:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1298 transitions. [2021-06-05 14:29:32,950 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1298 transitions. Word has length 18 [2021-06-05 14:29:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:32,950 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1298 transitions. [2021-06-05 14:29:32,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:29:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1298 transitions. [2021-06-05 14:29:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:32,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:32,951 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:33,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7858,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:33,151 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 17080050, now seen corresponding path program 311 times [2021-06-05 14:29:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:33,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915481415] [2021-06-05 14:29:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:33,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915481415] [2021-06-05 14:29:33,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915481415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684230854] [2021-06-05 14:29:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 14:29:33,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:29:33,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:33,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:33,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,390 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 15 treesize of output 11 [2021-06-05 14:29:33,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,393 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 26 treesize of output 20 [2021-06-05 14:29:33,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,396 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 [2021-06-05 14:29:33,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,399 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 16 treesize of output 12 [2021-06-05 14:29:33,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,468 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:29:33,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:33,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:29:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,685 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 27 treesize of output 21 [2021-06-05 14:29:33,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:33,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:33,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,731 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-05 14:29:33,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:29:33,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,748 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-05 14:29:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:33,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:33,753 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 [2021-06-05 14:29:33,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:33,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:33,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:33,785 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-05 14:29:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:33,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684230854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:33,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:33,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:33,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516955223] [2021-06-05 14:29:33,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:33,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:33,807 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) [2021-06-05 14:29:34,147 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:29:34,435 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:29:34,577 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 14:29:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:34,867 INFO L93 Difference]: Finished difference Result 509 states and 1583 transitions. [2021-06-05 14:29:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:29:34,868 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 [2021-06-05 14:29:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:34,868 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:29:34,868 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:29:34,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:29:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:29:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 407. [2021-06-05 14:29:34,872 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) [2021-06-05 14:29:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1308 transitions. [2021-06-05 14:29:34,873 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1308 transitions. Word has length 18 [2021-06-05 14:29:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:34,873 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1308 transitions. [2021-06-05 14:29:34,873 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) [2021-06-05 14:29:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1308 transitions. [2021-06-05 14:29:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:34,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:34,874 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:35,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7886,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:35,074 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1498317920, now seen corresponding path program 312 times [2021-06-05 14:29:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:35,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964484262] [2021-06-05 14:29:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:35,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964484262] [2021-06-05 14:29:35,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964484262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:35,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875715348] [2021-06-05 14:29:35,306 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 [2021-06-05 14:29:35,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:29:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:29:35,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:29:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:35,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,382 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 [2021-06-05 14:29:35,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 14:29:35,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,389 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 [2021-06-05 14:29:35,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,392 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 [2021-06-05 14:29:35,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,460 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:29:35,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:35,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-05 14:29:35,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,619 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 [2021-06-05 14:29:35,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,625 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 27 treesize of output 21 [2021-06-05 14:29:35,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:35,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,631 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 17 treesize of output 13 [2021-06-05 14:29:35,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:29:35,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,640 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 17 treesize of output 13 [2021-06-05 14:29:35,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:35,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,650 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 15 treesize of output 11 [2021-06-05 14:29:35,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,720 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-06-05 14:29:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,724 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 11 treesize of output 3 [2021-06-05 14:29:35,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:35,727 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 [2021-06-05 14:29:35,728 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:35,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:35,757 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-06-05 14:29:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:35,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875715348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:35,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:35,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:29:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601996063] [2021-06-05 14:29:35,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:35,821 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) [2021-06-05 14:29:36,279 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 14:29:36,618 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:29:36,760 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 14:29:36,907 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:29:37,117 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 14:29:37,284 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 14:29:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:29:37,448 INFO L93 Difference]: Finished difference Result 533 states and 1641 transitions. [2021-06-05 14:29:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:29:37,448 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 [2021-06-05 14:29:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:29:37,449 INFO L225 Difference]: With dead ends: 533 [2021-06-05 14:29:37,449 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 14:29:37,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1623.1ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:29:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 14:29:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 405. [2021-06-05 14:29:37,453 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) [2021-06-05 14:29:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-06-05 14:29:37,453 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-06-05 14:29:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:29:37,453 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-06-05 14:29:37,453 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) [2021-06-05 14:29:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-06-05 14:29:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:29:37,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:29:37,454 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:29:37,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7899,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:37,654 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:29:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:29:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash 218254206, now seen corresponding path program 313 times [2021-06-05 14:29:37,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:29:37,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638657188] [2021-06-05 14:29:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:29:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:37,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:29:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638657188] [2021-06-05 14:29:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638657188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190343501] [2021-06-05 14:29:37,832 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 [2021-06-05 14:29:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:29:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:29:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:29:37,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,914 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 [2021-06-05 14:29:37,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,918 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 16 treesize of output 12 [2021-06-05 14:29:37,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,921 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 [2021-06-05 14:29:37,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:29:37,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:29:37,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:37,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:29:37,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:37,994 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-05 14:29:37,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:29:37,995 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-05 14:29:38,233 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1982], 1=[array_0, v_prenex_1981]} [2021-06-05 14:29:38,236 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 25 treesize of output 19 [2021-06-05 14:29:38,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,239 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 15 treesize of output 11 [2021-06-05 14:29:38,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,271 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-05 14:29:38,272 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 27 treesize of output 21 [2021-06-05 14:29:38,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 14:29:38,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,289 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 14:29:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-05 14:29:38,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:29:38,294 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 11 treesize of output 3 [2021-06-05 14:29:38,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:29:38,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:29:38,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:29:38,318 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-05 14:29:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:29:38,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190343501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:29:38,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:29:38,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:29:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991644861] [2021-06-05 14:29:38,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:29:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:29:38,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:29:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:29:38,339 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) Received shutdown request... [2021-06-05 14:29:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:29:38,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7910,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:29:38,665 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:29:38,666 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:29:38,667 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:29:38,668 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:29:38 BasicIcfg [2021-06-05 14:29:38,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:29:38,668 INFO L168 Benchmark]: Toolchain (without parser) took 764286.13 ms. Allocated memory was 360.7 MB in the beginning and 459.3 MB in the end (delta: 98.6 MB). Free memory was 340.2 MB in the beginning and 420.0 MB in the end (delta: -79.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:29:38,668 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 360.7 MB. Free memory was 341.5 MB in the beginning and 341.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:29:38,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.46 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:29:38,668 INFO L168 Benchmark]: Boogie Preprocessor took 18.97 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:29:38,668 INFO L168 Benchmark]: RCFGBuilder took 386.34 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 342.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. [2021-06-05 14:29:38,669 INFO L168 Benchmark]: TraceAbstraction took 763849.64 ms. Allocated memory was 360.7 MB in the beginning and 459.3 MB in the end (delta: 98.6 MB). Free memory was 341.2 MB in the beginning and 420.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:29:38,669 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 0.15 ms. Allocated memory is still 360.7 MB. Free memory was 341.5 MB in the beginning and 341.4 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.46 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.97 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 386.34 ms. Allocated memory is still 360.7 MB. Free memory was 337.5 MB in the beginning and 342.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 763849.64 ms. Allocated memory was 360.7 MB in the beginning and 459.3 MB in the end (delta: 98.6 MB). Free memory was 341.2 MB in the beginning and 420.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (405states) and FLOYD_HOARE automaton (currently 5 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (405states) and FLOYD_HOARE automaton (currently 5 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (405states) and FLOYD_HOARE automaton (currently 5 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (405states) and FLOYD_HOARE automaton (currently 5 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763748.8ms, OverallIterations: 354, TraceHistogramMax: 2, EmptinessCheckTime: 170.1ms, AutomataDifference: 335914.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11228 SDtfs, 26182 SDslu, 74168 SDs, 0 SdLazy, 174451 SolverSat, 1998 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88925.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12105 GetRequests, 4138 SyntacticMatches, 636 SemanticMatches, 7330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23763 ImplicationChecksByTransitivity, 367356.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=437occurred in iteration=317, InterpolantAutomatonStates: 4113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1443.3ms AutomataMinimizationTime, 353 MinimizatonAttempts, 37564 StatesRemovedByMinimization, 352 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1399.7ms SsaConstructionTime, 3709.2ms SatisfiabilityAnalysisTime, 342749.5ms InterpolantComputationTime, 12134 NumberOfCodeBlocks, 12134 NumberOfCodeBlocksAsserted, 1023 NumberOfCheckSat, 11432 ConstructedInterpolants, 830 QuantifiedInterpolants, 344827 SizeOfPredicates, 3495 NumberOfNonLiveVariables, 25928 ConjunctsInSsa, 7485 ConjunctsInUnsatCore, 702 InterpolantComputations, 6 PerfectInterpolantSequences, 23/2660 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